mtg.wtf

You can't cast Keeper of the Yellow Hat during your first seven turns of the game. (Keep track if you're playing with this!)
When The Keeper of the Yellow Hat enters the battlefield, create a legendary artifact equipment token named Yellow Hat with equip {2} and "Equipped creature gets +4/+4 and gains lifelink."

When The Kenriths' Royal Funeral enters, exile up to two target legendary creature cards from your graveyard. You draw X cards and you lose X life, where X is the greatest mana value among cards exiled this way.
Legendary spells you cast cost {1} less to cast for each card exiled with The Kenriths' Royal Funeral.

Whenever equipped creature deals combat damage to a player, look at that many cards from the top of your library. You may exile a nonland card from among them. Put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost.
Equip {2}{U}

Eminence — While The Knight of Commentary is in the command zone or on the battlefield, you are freely allowed to ask people for advice on your game while playing. (This includes nearby players, friends around you, and even people you message on your phone, but it all must be done in a timely fashion, courteously, and without causing large interruptions in other games.)

Partner with Knight (You may select any legendary Knight to be this creature's partner. It doesn't have to have Partner. You don't search for a Knight when this enters the battlefield.)
Knights you control have haste and "At the beginning of your end step, if you didn't play a land this turn, you may discard a card, then draw a card."

Lifelink, vigilance, first strike
At the beginning of your combat step and whenever another Knight enters the battlefield under your control, put a day counter on The Knight of Weeks.
The Knight of Weeks gets +7/+7 for every seven day counters on it.

You may tap three untapped Dwarves you control rather than pay this spell's mana cost.
At the beginning of each end step, if a land you controlled was put into a graveyard from the battlefield this turn, reveal the top four cards of your library. You may put any number of Dwarf cards from among them into your hand. Put the rest on the bottom of your library in a random order.

The Legend of Arena can be your commander.
I, II — Create a 2/1 red Human Wizard creature token. Spells you cast this turn cost {1} less to cast for each Wizard you control.
III — Search your library for a planeswalker card, put it onto the battlefield, then shuffle your library. It enters with an additional loyalty counter on it for each Wizard you control.

Flying
Whenever you draw a card, create a 1/1 blue and red Insect creature token with flying and haste.
{2}{U}{R}: Draw a card, then discard a card.
When The Locust God dies, return it to its owner's hand at the beginning of the next end step.

Whenever a land you control enters from anywhere other than your hand or you cast a spell from anywhere other than your hand, create a 3/3 red Spawn creature token.

Players have no maximum hand size.
Whenever a creature you control deals combat damage to a player, you may draw a card.
Whenever chaos ensues, put a shadow counter on target creature.

When you planeswalk to The Maelstrom and at the beginning of your upkeep, you may reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield. If you revealed a card but didn't put it onto the battlefield, put it on the bottom of your library.
Whenever chaos ensues, return target permanent card from your graveyard to the battlefield.

When The Magic Bandit deals combat damage to an opponent, exile the top card of that player's library. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast that spell.
Whenever you cast a spell or play a land you don't own, copy it.

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
You have no maximum hand size.
At the beginning of your upkeep, put a knowledge counter on The Magic Mirror, then draw a card for each knowledge counter on The Magic Mirror.

The The Magical City, New enters the battlefield tapped.
{T}: Add {W}, {U}, or {R}. When this mana is spent to cast a legendary spell, put a +1/+1 counter on this land.
{4}: The Magical City, New becomes a 1/1 white, blue, and red Human Artist creature until end of turn.
The Magical City, New can be your Commander. (Commander tax still applies.)

Whenever you cast a multicolored spell, create a tapped Powerstone token.
{X}{X}{X}, {T}: Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order.

I — Exile up to one target Saga card from a graveyard. Copy its chapter I ability.
II — Exile up to one target Saga card from a graveyard. Copy its chapter II ability.
III — Exile up to one target Saga card from a graveyard. Copy its chapter III ability.

As this creature enters the battlefield, choose cosplay or science.
• Cosplay — Whenever you cast a creature or planeswalker spell, this creature's base power and toughness each become equal to that spell's mana value until end of turn.
• Science — Whenever you cast an instant or sorcery spell, this creature deals 2 damage to each opponent.

Whenever you cast a creature spell, draw a card.
Tap three untapped creatures you control: Add {G}{G}{G}.

Whenever this creature attacks, create a Food token.
Whenever you sacrifice a food, choose one —
• Gelato — Target creature gains haste and trample until end of turn.
• Pasta — Scry 1.
• Pizza — Tap target creature.

Body Thief — When you cast this spell, you may exile a creature you control and put a takeover counter on it.
You may have The Master, Formed Anew enter as a copy of a creature card in exile with a takeover counter on it.

Make Them Pay — Whenever a nontoken artifact creature you control dies, you may exile it. If you do, choose an opponent with the most life among your opponents. That player faces a villainous choice — They lose 4 life, or you create a token that's a copy of that card.

{T}: Target creature an opponent controls with power less than or equal to The Master's power gains skulk until end of turn. Goad it.
Whenever a creature with skulk deals combat damage to one of your opponents, put a +1/+1 counter on The Master and draw a card.

Myriad
The "legend rule" doesn't apply to creature tokens you control.
Triggered abilities you control can't cause you to sacrifice or exile creature tokens you control.