Disordered Invasion

Whenever a nonland permanent enters the battlefield from an opponent's library, create a
token that's a copy of it. If it's a creature, goad all creatures with the same name as that token and
they gain haste until end of turn. Exile that token
at the beginning of the next end step. (Until your
next turn, those creatures attack each combat if able
and attack a player other than you if able.)
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Here or there, all was nothing but mayhem.