Unholy Trio Intervention

Choose 1 or more:
• For each {u} spent to cast this spell tap or block
up to 1 target creature or nonland permanent.
• For each {b} spent to cast this spell create a 2/2
black Zombie creature token.
• For each pair of {u}{b} spent to cast this spell
put a -1/-1 counter on up to 1 creature.
{bull} Surveil X, then draw X, then discard (3 - X).
Flashback {x}{x}{x}