Anubis

Indestructible
3{u}: Attach this to target creature.
You control equipped creature.
Equipped creature gains +2/+2, First Strike, and Vigilance. Additionally, When equipped creature fights a creature, put a counter for that creature
on Anubis. When equipped creature fights a
creature Anubis has a counter for, it gains +1/+2
and Double Strike until the end of the combat
phase.