mtg.wtf

Noncreature spells cost {1} more to cast.

{4}: Scry 1, then reveal the top card of your library. If it's a land card, put it onto the battlefield tapped. Otherwise, draw a card.
Partner

Time Vault enters tapped.
Time Vault doesn't untap during your untap step.
If you would begin your turn while Time Vault is tapped, you may skip that turn instead. If you do, untap Time Vault.
{T}: Take an extra turn after this one.

Take an extra turn after this one.

Each player shuffles their hand and graveyard into their library, then draws seven cards.

As an additional cost to cast this spell, sacrifice an artifact.
Search your library for an artifact card, put that card onto the battlefield, then shuffle.

{T}: Add {U} for each artifact you control.

Delve
Draw three cards.

As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast.

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.

When Urza, Lord High Artificer enters, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."
Tap an untapped artifact you control: Add {U}.
{5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Whenever a player casts a spell, if no mana was spent to cast it, counter that spell.
{1}, {T}, Sacrifice Vexing Bauble: Draw a card.

When this creature specializes, remove all study counters from it. Seek two creature cards with mana value less than or equal to the number of study counters removed this way. Put one of them onto the battlefield and shuffle the other into your library.
{T}: Draw a card, then discard a card.

When this creature specializes, remove all study counters from it. When you do, Vhal, Scholar of Elements deals that much damage to target creature or planeswalker an opponent controls.
{T}: Draw a card, then discard a card.

When this creature specializes, remove all study counters from it. When you do, put target creature card with mana value less than or equal to the number of study counters removed this way from a graveyard onto the battlefield under your control.
{T}: Draw a card, then discard a card.

When this creature specializes, remove all study counters from it. Look at that many cards from the top of your library. Put one of those cards into your hand and the rest on the bottom of your library in a random order.
{T}: Draw a card, then discard a card.

When this creature specializes, remove all study counters from it. When you do, distribute that many +1/+1 counters among any number of target creatures.
{T}: Draw a card, then discard a card.

Whenever you cast your first spell each turn, choose an opponent at random. Vial Smasher the Fierce deals damage equal to that spell's mana value to that player or a planeswalker that player controls.
Partner

When this creature specializes, choose up to one target creature card and up to one target instant or sorcery card from among cards exiled with this creature. Conjure a duplicate of each of those cards into your hand. The duplicates perpetually gain "You may spend mana as though it were mana of any color to cast this spell."
{1}: Exile target card from a graveyard.

When this creature specializes, conjure a duplicate of target creature card exiled with this creature into your hand. The duplicate perpetually gains "You may spend mana as though it were mana of any color to cast this spell" and "When this creature enters, each opponent loses 2 life and you gain 2 life."
{1}: Exile target card from a graveyard.

When this creature specializes, conjure a duplicate of target creature card exiled with this creature into your hand. The duplicate perpetually gains "You may spend mana as though it were mana of any color to cast this spell." If it has mana value 3 or less, you may put it onto the battlefield.
{1}: Exile target card from a graveyard.

When this creature specializes, conjure a duplicate of target creature card exiled with this creature into your hand. The duplicate perpetually gets +2/+2 and gains "You may spend mana as though it were mana of any color to cast this spell."
{1}: Exile target card from a graveyard.

When this creature specializes, conjure a duplicate of target creature card exiled with this creature into your hand. The duplicate perpetually gets +1/+0 and gains haste and "You may spend mana as though it were mana of any color to cast this spell."
{1}: Exile target card from a graveyard.