Dabi

Flash, Haste
When Dabi enters the battlefield all red Mana creatures gain a +2/+2 counter until Dabi leaves the battlefield
If Dabi were to leave the battlefield due to an attack you may pay {r}{b}{u} to return Dabi to the battlefield and put one -2/-2 counter on him

"Heroes are forgettable. They try to save the world, but villains are the ones who change it."