If the target creature is an illegal target as Absorb Identity tries to resolve, it won't resolve and none of its effects will happen. Shapeshifters you control won't become copies of the creature.
2021-02-05
wotc
If the creature that was returned was copying something else, the Shapeshifters that become copies of that creature will use the copiable values of that creature. In most cases, they will be copies of whatever that creature was copying. If it was copying a permanent or card with {X} in its mana cost, X is 0.
2021-02-05
wotc
If Shapeshifters you control do become copies of the creature, they'll use the copiable values of the creature as it last existed on the battlefield. They don't copy whether that creature was tapped or untapped, whether it had any counters on it, whether it had any Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on.
2021-02-05
wotc
Either all Shapeshifters you control will become copies of the creature or none of them will.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Legal
Timeless
Legal
Gladiator
Legal
Pioneer
Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Not Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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