As The Mimeoplasm enters the battlefield, you may exile two creature cards from graveyards. If you do, it enters the battlefield as a copy of one of those cards with a number of additional +1/+1 counters on it equal to the power of the other card.

At the beginning of your upkeep, each opponent loses X life and you scry X, where X is the number of Zombies you control.
: Exile target creature card from a graveyard. Create a token that's a copy of it, except it's a 4/4 black Zombie.
When The Scarab God dies, return it to its owner's hand at the beginning of the next end step.

Whenever a creature with a -1/-1 counter on it dies, draw a card.
: Put a -1/-1 counter on another target creature.
When The Scorpion God dies, return it to its owner's hand at the beginning of the next end step.

Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost less to cast.
Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

At the beginning of your upkeep, if you're eating, create a 1/1 colorless Thopter artifact creature token with flying. Use food to represent the token.
Whenever a creature token you control dies, if it's represented by food, eat it.

: Thornling gains haste until end of turn.
: Thornling gains trample until end of turn.
: Thornling gains indestructible until end of turn.
: Thornling gets +1/-1 until end of turn.
: Thornling gets -1/+1 until end of turn.

Whenever you cast an instant or sorcery spell, copy it for each other instant and sorcery spell you've cast before it this turn. You may choose new targets for the copies.

: 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 (You can have two commanders if both have partner.)

Haste
Whenever Thraximundar attacks, defending player sacrifices a creature.
Whenever a player sacrifices a creature, you may put a +1/+1 counter on Thraximundar.

Enchant creature with converted mana cost 2 or less
You control enchanted creature.

Devour X, where X is the number of creatures devoured this way (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with X +1/+1 counters on it for each of those creatures.)

This spell can't be countered.
Hexproof (This creature can't be the target of spells or abilities your opponents control.)
: Regenerate Thrun, the Last Troll.

Flying
Haste (This creature can attack and as soon as it comes under your control.)
When Thundermaw Hellkite enters the battlefield, it deals 1 damage to each creature with flying your opponents control. Tap those creatures.

[+1]: Draw a card, then discard a card at random.
[−4]: Tibalt, the Fiend-Blooded deals damage equal to the number of cards in target player's hand to that player.
[−6]: Gain control of all creatures until end of turn. Untap them. They gain haste until end of turn.

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

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
, , Put Timestream Navigator on the bottom of its owner's library: Take an extra turn after this one. Activate this ability only if you have the city's blessing.

At the beginning of each end step, if an opponent discarded a card this turn, you draw a card and you lose 1 life.
: Each opponent with no cards in hand loses 10 life.

Tishana, Voice of Thunder's power and toughness are each equal to the number of cards in your hand.
You have no maximum hand size.
When Tishana enters the battlefield, draw a card for each creature you control.

When Titania, Protector of Argoth enters the battlefield, return target land card from your graveyard to the battlefield.
Whenever a land you control is put into a graveyard from the battlefield, create a 5/3 green Elemental creature token.

Decorated Cards in your hand have miracle . (Decorated cards include premiums, promos, and cards with alternate frames or art.)
At the beginning of your upkeep, if you control twelve or more decorated permanents, you win the game.