Michael, Artifice Scholar

Partner with Erin, Grove Guardian
Enchantment spells you cast have Improvise.
(Your artifacts can help cast enchantment spells.
Each artifact you tap after you're done activating
mana abilities pays for {1})

Creatures can't attack you or a planeswalker you
control unless they pay {1} for each of those
creatures equal to the number of non-token
artifacts you control.