Black Knife Ashes

Enchant Creature
{1}{b}{b}: Create a legendary black 1/1 Spirit
Assassin creature token named "Tiche". When
Tiche enters the battlefield, choose a creature.
That creature loses all abilities until end of turn.
Tiche gains haste and deathtouch. Sacrifice it at
the beginning of the next end step. Activate this ability only once a turn and only during combat.