Keyword: Changeling

Changeling (This card is every creature type.)
Creatures target player controls get +0/+1 and gain all creature types until end of turn.

Changeling (This card is every creature type.)
Target creature gets +3/-3 and loses all creature types until end of turn.

Changeling (This card is every creature type.)
Creatures target player controls get -2/-0 and lose all creature types until end of turn.

Changeling (This card is every creature type.)
As long as a creature card with flying is in a graveyard, Cairn Wanderer has flying. The same is true for fear, first strike, double strike, deathtouch, haste, landwalk, lifelink, protection, reach, trample, shroud, and vigilance.

Changeling (This card is every creature type.)
Champion a creature (When this enters the battlefield, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Changeling (This card is every creature type.)
Until end of turn, target creature has base power and toughness 4/4, gains all creature types, and gains flying.

Changeling (This card is every creature type.)
: Target creature gains all creature types until end of turn.
: Target creature loses all creature types until end of turn.

Changeling (This card is every creature type.)
: Regenerate Skeletal Changeling.

Changeling (This card is every creature type.)
: Fire-Belly Changeling gets +1/+0 until end of turn. Activate this ability no more than twice each turn.

Changeling (This card is every creature type.)
Haste
Champion a creature (When this enters the battlefield, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

Changeling (This card is every creature type.)
Up to two target creatures each get +2/+0 and gain all creature types until end of turn.

Changeling (This card is every creature type.)
Champion a creature (When this enters the battlefield, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

Changeling (This card is every creature type.)
: Switch Turtleshell Changeling’s power and toughness until end of turn.

Changeling (This card is every creature type.)
: Ghostly Changeling gets +1/+1 until end of turn.

Changeling (This card is every creature type.)
Exile target creature. Its controller creates a 1/1 colorless Shapeshifter creature token with changeling.

Changeling (This card is every creature type.)
Flying

Changeling (This card is every creature type.)
: Target Shapeshifter becomes a copy of target creature until your next turn.

Changeling (This card is every creature type.)