First Diabolite

Instants you cast cost {1} less to cast.

Whenever you cast a {b} instant, sorcery, or enchantment, First Diabolite gains +2/+1.

Whenever you cast a {r} instant, sorcery, or enchantment, you can deal 3 damage to any creature, planeswalker, or player.

Partner (You can have two commanders if both have partner.)