SpectreKryik, The Tactician

Prowess, Banding
Magecraft —Whenever you cast or copy an
instant or sorcery spell, put a spot counter on
target permanent an opponent controls.
Whenever a permanent opponent controls with a spotted counter blocks or is blocked by a creature
you control, give it -1-1 until end of turn. If a permanent an opponent controls with a spotted counter would be dealt non-combat damage,
double it.