Syr Armont, the Redeemer (Wilds of Eldraine)

Legendary Creature — Human Knight - When Syr Armont enters, create a Monster Role token attached to another target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has trample.)
Enchanted creatures you control get +1/+1.