Rell, The Iron Maiden

When Rell enters the battlefield, you may attach
any number of artifacts and enchantments onto
her. Rell can also target opponents' artifacts and
enchantments.
Rell gets +1/+1 for the total mana cost of those
artifacts and enchantments. Each Treasure token
counts as a +1/+1 counter.
"They'll pay for what happened to me. Noxus,
The Black Rose... everyone."