mtg.wtf

You can't enter this dungeon unless you "venture into Undercity."
Secret Entrance — Search your library for a basic land card, reveal it, put it into your hand, then shuffle. (Leads to: Forge, Lost Well)
Forge — Put two +1/+1 counters on target creature. (Leads to: Trap!, Arena)
Lost Well — Scry 2. (Leads to: Arena, Stash)
Trap! — Target player loses 5 life. (Leads to: Archives)
Arena — Goad target creature. (Leads to: Archives, Catacombs)
Stash — Create a Treasure token. (Leads to: Catacombs)
Archives — Draw a card. (Leads to: Throne of the Dead Three)
Catacombs — Create a 4/1 black Skeleton creature token with menace. (Leads to: Throne of the Dead Three)
Throne of the Dead Three — Reveal the top ten cards of your library. Put a creature card from among them onto the battlefield with three +1/+1 counters on it. It gains hexproof until your next turn. Then shuffle.

I — Urza's Saga gains "{T}: Add {C}."
II — Urza's Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'"
III — Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.

[+1]: Head to AskUrza.com and click +1.
(Randomly choose one of —
• Until end of turn, up to one target creature gets +1/+1 and gains first strike, vigilance, and lifelink.
• Distribute three +1/+1 counters among one, two, or three target creatures you control.
• Destroy target noncreature permanent.
• Create two 3/1 red Elemental creature tokens with haste. Exile them at the beginning of the next end step.
• Create three 1/1 white Soldier creature tokens.
• Create a 3/3 black Beast creature token with deathtouch.
• Reveal the top five cards of your library. Put all creature cards revealed this way into your hand and the rest on the bottom of your library in any order.
• During target opponent's next turn, creatures that player controls attack Urza if able.
• Put a loyalty counter on Urza for each creature target opponent controls.
• Until your next turn, whenever a creature an opponent controls attacks, it gets -1/-0 until end of turn.
• Target player exiles a card from their hand.
• Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand.
• Target land you control becomes a 4/4 Elemental creature with trample. It's still a land.
• Draw a card, then add one mana of any color.
• Until end of turn, Urza becomes a legendary 4/4 red Dragon creature with flying, indestructible, and haste. (He doesn't lose loyalty while he's not a planeswalker.)
• Until your next turn,creatures you control get +1/+0 and gain lifelink.
• Look at the top five cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
• Urza deals 3 damage to any target.
• Until your next turn,whenever a creature deals combat damage to Urza, destroy that creature.
• Add X mana in any combination of colors, where X is the number of creatures you control.)
[–1]: Head to AskUrza.com and click -1.
(Randomly choose one of —
• Urza deals 3 damage to each creature.
• Gain control of target creature.
• Urza deals 4 damage to any target and you gain 4 life.
• Destroy target creature. You gain life equal to its toughness.
• You get an emblem with “Creatures you control get +1/+1.”
• You may put a creature card from your hand onto the battlefield.
• Draw three cards, then put a card from your hand on top of your library.
• Target player puts the top ten cards of their library into their graveyard.
• Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other on the bottom of your library in any order.
• Exile target permanent.
• Reveal the top five cards of your library. You may put all creature cards and/or land cards from among them into your hand. Put the rest into your graveyard.
• Search your library for a card and put that card into your hand. Then shuffle your library.
• Target player sacrifices two creatures.
• Create a 5/5 black Demon creature token with flying. You lose 2 life.
• Create a 4/4 gold Dragon creature token with flying.
• Target player's life total becomes 10.
• Destroy target nonland permanent.
• Return target permanent from a graveyard to the battlefield under your control.
• Create two 3/3 green Beast creature tokens.
• Draw four cards,then discard two cards.)
[–6]: Head to AskUrza.com and click -6.
(Randomly choose one of —
• Urza deals 7 damage to target player or planeswalker. That player or that planeswalker's controller discards seven cards, then sacrifices seven permanents.
• You get an emblem with “If a source would deal damage to you or a planeswalker you control, prevent all but 1 of that damage.”
• Destroy all lands target player controls.
• Create X 2/2 white Cat creature tokens, where X is your life total.
• You gain 100 life.
• Urza deals 10 damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.
• You get an emblem with “Creatures you control have double strike, trample, hexproof, and haste.”
• You get an emblem with “Artifacts, creatures, enchantments, and lands you control have indestructible.”
• Create a 6/6 green Wurm creature token for each land you control.
• Each player shuffles their hand and graveyard into their library. You draw seven cards.
• Destroy up to three target creatures and/or other planeswalkers. Return each card put into a graveyard this way to the battlefield under your control.
• You get an emblem with “Whenever you cast a spell, exile target permanent.”
• You get an emblem with “Whenever a creature enters the battlefield under your control, you may have it fight target creature.” Then create three 8/8 blue Octopus creature tokens.
• You control target player during that player's next turn.
• Exile all cards from target player's library, then that player shuffles their hand into their library.
• Create three 1/1 black Assassin creature tokens with “Whenever this creature deals combat damage to a player, that player loses the game.”
• Put all creature cards from all graveyards onto the battlefield under your control.
• You gain X life and draw X cards, where X is the number of lands you control.
• Flip five coins. Take an extra turn after this one for each coin that comes up heads.
• You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.)

I — Create a 1/1 white Human Soldier creature token and a Food token.
II, III — You may put an Aura or Equipment card from your hand or graveyard onto the battlefield. If an Equipment is put onto the battlefield this way, you may attach it to a creature you control.

Whenever a green nontoken creature dies, that creature's controller may search their library for a card with the same name as that creature, put it onto the battlefield, then shuffle.

[+2]: You may sacrifice a creature. If you do, search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put it onto the battlefield, then shuffle.
[+1]: Mill five cards, then put any number of creature cards milled this way into your hand.
[–1]: Create a 4/4 green Rhino Warrior creature token.

You may look at the top card of your library any time.
You may cast creature spells from the top of your library.
[+1]: Create a 3/3 green Beast creature token. Put your choice of a vigilance counter, a reach counter, or a trample counter on it.
[–2]: When you next cast a creature spell this turn, search your library for a creature card with lesser mana value, put it onto the battlefield, then shuffle.

{T}: Add {C}.
{1}, {T}, Sacrifice Volatile Fault: Destroy target nonbasic land an opponent controls. That player may search their library for a basic land card, put it onto the battlefield, then shuffle. You create a Treasure token.

I — Destroy target land.
II — Put target land card from a graveyard onto the battlefield under your control.
III — Choose target opponent. If they control fewer lands than you, create a number of 4/4 green Troll Warrior creature tokens with trample equal to the difference.

Roll two d4 and choose one result. Create a number of 3/3 green Beast creature tokens equal to that result. Then search your library for a number of basic land cards equal to the other result, put them onto the battlefield tapped, then shuffle.

[+1]: Reveal the top four cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard.
[0]: Put any number of land cards from your hand onto the battlefield tapped.
[–3]: Create a green Treefolk creature token with reach and "This creature's power and toughness are each equal to the number of lands you control."
[–8]: Return all permanent cards from your graveyard to your hand. You get an emblem with "You have no maximum hand size."

[+1]: Add X mana in any combination of {R} and/or {G}, where X is the number of creatures you control.
[0]: Create a 2/2 red and green Satyr creature token with haste.
[–6]: Exile the top seven cards of your library. You may put any number of creature and/or land cards from among them onto the battlefield.