Cruz, Coniving Mastermind

Master Plan — Whenever you cast or copy an instant or sorcery spell, put a brain counter on Cruz. Instant and sorcery spells you cast cost {x} less to cast, where X is the number of brain counters on Cruz.

Denial — Remove X brain counters from Cruz: Counter target spell with mana value less than X.

Overload — At the beginning of your upkeep, remove all brain counters from Cruz. Cruz deals X damage to up to
X targets, where X is the number of brain counters remov