Spellslinger Engine

Whenever you cast an instant or sorcery spell you may add {1} mana of any of that spells colors. whenever you use this ability put a charge counter on Spellslinger Engine and it deals X damage to you where X is the amount of charge counters on Spellslinger Engine.
On your endstep if there are 5 or more charge counters on Spellslinger Engine sacrifice it and it deals 2 damage for each charge counter on it to you and every creature you control
{3}: remove 1 charge counter from Spellslinger Engine.