Fuse, explosives enthusiast

When fuse enters the field, he gains explosive 5 explosive counters.
Grenade:{1}{r} spend a explosive counter to deal 3 damage to opponent creature or plainswalker
Thermite: {3}{r} spend an explosive counter target opponent artifact and destroy it.
Arc star:{2}{r} spend an explosive counter to target an opponent creature with flying and deal 4 damage.
Cluster grenade: {4}{r} spend 3 explosive counters to deal 3 damage to all creatures your opponent controls.