Nami, Who Lurks in Shadow

Infest, Flash.

Knife in the Dark - Whenever an opponent casts a spell during your turn they lose 4 life, and you may have Nami deal damage equal to its power to target creature.

Remote Poison Generation - {b}: Target non-legendary creature or spell gains Deathtouch until end of turn. Activate this ability only once each turn.

Sins of the Father - Whenever a creature with a -1/-1 counter on it dies, you may put a -1/-1 counter on another target creature.