Loki, Playful Prankster

When Loki, Playful Prankster enters the battlefield, return target creature to its owner's hand
{b}: sacrifice a creature, return that creature to the battlefield on the next end step
{1}{g}: Turn target creature into a 3/3 with trample and haste until the next end step
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"Oh, Loki. When will you learn" -Odin