Epic Card Game will only set you back $15
Avenger of the Fallen mobilizes based on the number of creatures in your graveyard, while a creature equipped with Infantry Shield mobilizes X, where X is that creatures power
You cant add more than 100 damage this way
For example, I recently built a version of Aang, at the Crossroads, where the entire game plan was to resolve it and then copy it repeatedly to keep retriggering its ETB ability
(Equipment, Auras you control, and counters are modifications.) Enchantment - Aura Ulasht, the Hate Seed Ulasht enters with a +1/+1 counter on it for each other red creature you control and a +1/+1 counter on it for each other green creature you control
They were designed to give every card in a set a collectible shine, not just the rare ones