Erathym, Affectionate Abjurer

Protection from instants
When Erathym, Affectionate Abjurer enters
or an Aura becomes attached to this creature, create Beat, a legendary 0/4 red Wall creature token with defender, flying, and "All damage
that would be dealt to Erathym is dealt to this creature instead."
"My heart is in the right place. Literally. Get behind Beat!"