Flaxian Contract

This spell may only be cast if you have Dominance(if a permanent controlled by an opponent left the battlefield this turn, you have Dominance)
Choose two
-Destroy target tapped creature
-Destroy target artifact or enchantment
-Target player loses 3 life and you gain 3 life
Pheromonic sensors can be used to detonate a bomb when a specific species comes in range. They're known to be used by Flaxian assassins.