Elemental Blessing Rune (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Components:||V, S, M (stone with an elemental rune on it or drawing the symbol of the rune in sand/air)|
|Duration:||Concentration, up to 10 minutes|
You choose a willing creature within range and bless them with an elemental rune. You choose a damage type from fire, cold, thunder, acid, lightning, or poison and grant the creature immunity to all damage of that type for the duration of the spell.
In addition, the affected creature deals an 1d4 damage of the selected damage type with successful melee attacks.
At Higher Levels. When you cast this spell using a spell slot of 6th level, the duration increases by 12 seconds and the damage increases by 2d4. When you cast this spell using a spell slot of 8th level, the duration increases by 24 seconds, the damage increases by 3d4 and the caster can change the damage type of this blessing at will on their turn, but only once per turn.