Wing reveal. when combat starts the aasimar reveals its angel like wings. the heal 10HP to each ally and do 10 radiant dmg to each ennemy in a 10ft radius.
if a corpse is in the aura range it will get up with 10 HP and will count as an ally. if the creature then leaves the aura it will take 10 dmg at the end of its turn
the creature comes back as what it was before keeping its skills and stats except that it will see the aasimar as an ally

Spellcasting. it can cast banishment 3 times a day with a DC 17 charisma save

multiattack. the palladin attack twice.

radiant sword attack. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 11 (1d12+4) slashing damage plus 11 (2d10) radiant damage

magic dampening. once its turn it can cast counterspell up to a total of 5 times a day.