A-Unholy Heat 
Instant
Unholy Heat deals 2 damage to target creature or planeswalker. Delirium — Unholy Heat deals 4 damage instead if there are four or more card types among cards in your graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL