You flick your disco lighter and toss it at him, dealing X damage. or
You toss a small disco ball grenade at him, lighting him up for X damage. or
You let your disco fever flow through you until it lights a little fire under him for X damage.
When used with 1 point of Disco Momentum:
You toss a pretty big disco ball grenade at your foe or
You burn with a disco fever, and you release that fever in a disco inferno that hits your foe for X damage. or
You stop dancing for long enough to snap your fingers, and when you do, a gout of flame bursts out of them, scorching your opponent for X damage.
When used with 2 points of Disco Momentum:
You notice sparks flying from your fingers as you boogie, and you flick them into your foe, who apparently are made of old, dry wood. He crackles and blazes for X damage. or
You've got some serious night fever, night fever. Your feet are on fire! No, I mean, literally. You kick the flames out on your foe before you burn your shoes, for X damage. or
You're feelin' hot, hot, hot. Your disco spirit is so strong you're wreathed in flame! You dance into your foe, immolating them (which is the sincerest form of flattery) for X damage.
When used with 3 points of Disco Momentum:
You burn down the boogie wonderland with an intense disco inferno, doing X damage. or
You cackle, "burn, baby, burn!" as you unleash a disco inferno on him, blazing them up for X damage. or
You combine your boogie fever with your Saturday night fever and unleash a ring of flame that spreads outwards, engulfing your opponent for X damage.