Boros Charm

You hold out your Boros emblem, and invoke the Boros Legionnaire's power. You can choose a target within range and activate one of the following effects:

• You can lob a ball of fire at it. The target must make a Constitution Saving Throw. On a failure, the target takes 5d10 fire damage while taking half the damage rolled on a success. 
• You can give that target resistance to all damage for one round until the start of your next turn.
• You can heal the target for 4d8 + the level of the spell. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, you can either increase the fire damage by 1d10, increase the healing by 1d8, or increase the duration of the damage resistance for an extra round.