Mortuary Spire

As Mortuary Spire enters the battlefield, you may pay 3 life. If you don’t, it enters tapped. {T}: Add {B}, {R}, or {U} Whenever a creature dies, you may pay {2}. If you do, put a decay counter on Mortuary Spire. {B}{R}{U}{T}, Remove X decay counters: Draw X cards and gain half of X life, rounded down.