Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield. {3}, {T}: Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)

{2}: This artifact becomes a copy of target artifact, creature, enchantment, or land until end of turn.

{1}{U}: Target spell or permanent becomes the color of your choice until end of turn.

Each creature assigns combat damage equal to its toughness rather than its power.

{U}{U}, {T}: Gain control of target legendary permanent. (This effect lasts indefinitely.)

Experiment Kraj has all activated abilities of each other creature with a +1/+1 counter on it. {T}: Put a +1/+1 counter on target creature.

Whenever another green creature you control enters, put a +1/+1 counter on target creature.

You may have Sakashima enter as a copy of another creature you control, except it has Sakashima's other abilities. The "legend rule" doesn't apply to permanents you control. Partner (You can have two commanders if both have partner.)

As this enchantment enters, choose a creature type. Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Whenever an artifact, creature, or enchantment enters, its controller chooses target permanent another player controls that shares a card type with it. Exchange control of those permanents.

As this enchantment enters, choose a creature type. Creatures you control are the chosen type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Creatures you control get +1/+1.

All creatures lose all abilities and have base power and toughness 1/1.

Enchant creature When this Aura enters attached to a creature, each other nontoken creature you control becomes a copy of that creature. Nontoken creatures you control enter as a copy of enchanted creature.

Change the text of target spell or permanent by replacing all instances of one color word with another. (This effect lasts indefinitely.) Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Change the text of target spell or permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. Draw a card.

Switch target creature's power and toughness until end of turn. Draw a card.