Imposter

{t}{1} Vent. Imposter gains Hex-proof
until the end of your turn.
{t}{3} Sabotage . Target player is forced
to tap 2 mana until the end of their turn.
{t}{7} Imposter kills any target creature.
{8} Rampage. Imposter becomes 20/20,
gains invincibility, death touch and hex
proof till the end of your turn. After
rampage imposter is tapped after one turn.