Enchant creature you control
When enchanted creature dies, return it to the battlefield under your control, then return this card to the battlefield transformed under your control.

Changeling (This card is every creature type.)
Flying

Nonbasic lands are Mountains.

When this creature enters, put two level counters on each creature you control with level up.

, : Target opponent mills three cards. Put a land card from their graveyard onto the battlefield tapped under your control. It gains "If this land would leave the battlefield, exile it instead of putting it anywhere else."
, , Sacrifice Realmbreaker: Search your library for any number of Praetor cards, put them onto the battlefield, then shuffle.

Whenever one or more Goblins you control attack, create a 1/1 red Goblin creature token that's tapped and attacking.
Whenever another creature you control enters, General Kreat deals 1 damage to each opponent.

Reveal cards from the top of your library until you reveal a land card. Put that card onto the battlefield and the rest on the bottom of your library in any order. Clash with an opponent. If you win, return Recross the Paths to its owner's hand. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)

Sacrifice this creature: You gain 3 life.

Whenever this creature or another creature you control dies, scry 1.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
Threshold — If there are seven or more cards in your graveyard, instead search your library for up to three basic land cards, put them onto the battlefield tapped, then shuffle.

Devoid (This card has no color.)
Ingest (Whenever this creature deals combat damage to a player, that player exiles the top card of their library.)
This creature can't be blocked.

Choose one —
• Destroy target artifact.
• Creatures without flying can't block this turn.

First strike
: Until end of turn, this creature becomes a Dragon, gets +5/+3, and gains flying and trample.

Exile the top thirteen cards of your library, then search your library for a card. Put that card into your hand, then shuffle.

As this artifact enters, choose a color.
Creatures you control of the chosen color get +1/+0.
: Add one mana of the chosen color.

Artifact and enchantment spells your opponents cast cost more to cast.
Sacrifice this enchantment: Destroy target artifact or enchantment.

Vigilance
When this creature dies, draw a card.

Whenever you draw a card, each opponent mills two cards.

+1: Draw a card, then put a card from your hand on top of your library.
−1: Exile another target permanent you own, then return it to the battlefield under your control.
−6: Choose left or right. Each player gains control of all nonland permanents other than Aminatou controlled by the next player in the chosen direction.
Aminatou, the Fateshifter can be your commander.

Whenever a creature attacks you, it gets -1/-0 until end of turn.

You may exert this creature as it attacks. When you do, it gets +2/+2 until end of turn. (An exerted creature won't untap during your next untap step.)

First strike, protection from red and from white
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Whenever you cast a red spell, untap Chandra.
: Chandra deals 1 damage to target player or planeswalker. If Chandra has dealt 3 or more damage this turn, exile her, then return her to the battlefield transformed under her owner's control.

This creature has flying as long as you've cast an instant or sorcery spell this turn.

At the beginning of your upkeep, each player may put two +1/+1 counters on a creature they control. If a player does, creatures that player controls can't attack you or planeswalkers you control until your next turn.

Prevent all damage that sources of the color of your choice would deal this turn.
Flashback—Tap an untapped white creature you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

At the beginning of your upkeep, this creature deals 1 damage to each creature and each player.
When this creature dies, it deals 1 damage to each creature and each player.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Counter target spell unless its controller pays .

Whenever an opponent is dealt 3 or more damage by a single source, that player discards a card.

Each opponent exiles cards from the top of their library until that player has exiled cards with total mana value 20 or greater.

Flying
Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

At the beginning of the end step, if you control four or more creatures named Biovisionary, you win the game.

Flash
Enchant creature
At the beginning of your upkeep, you lose 1 life.
: Regenerate enchanted creature.

Counter target creature spell.
Draw a card.