Phaizek, Implanted Activator

Prototype (You may cast this spell {w}
with different mana cost, color, and -------
size. It keeps its abilities and types.) | 2/1|
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First strike
{6}{w}{w}: Exile target creature you control. Return
that card to the battlefield tapped under your
control at the beginning of the next end step.
This ability costs {x} less to activate, where X is
the mana value of the creature it ta