Explosive Grenade Blast, Ultimate Spell Impact, Boss Arri...

Four DISTINCT action game SFX, each one isolated event starts immediately, close dry microphone, strong punchy transient, concise decay, no background music, no electronic beeps, no voices. Generate individually in this exact order: 1. heavy grenade explosion instant sharp blast followed by low rumble and debris falling, no delayed boom; 2. hero ultimate spell release, rushing air into enormous orchestral percussion impact with shimmering metal tail; 3. boss arrival ominous huge war drum hit and low brass growl, short cinematic warning; 4. boss defeated triumphant bright orchestral brass and cymbal hit with collapsing rubble