Arakhor, Blackblade

Bladebound-Whenever Arakhor, Bladeblade is cast,
if you control Argavion, Spellsword, you may equip
this card to it without playing its equipping cost.

Creature equipped gains "Whenever you cast an
instant or sorcery spell, put a +1/+1 counter on this
creature"

Equip {3}