Like many in her ink color, Calhoun enjoys the resist keyword that nets her a flat damage reduction of 1
If a player is instructed to put a card into their graveyard from their library without using the word "mill," (by the effect of Rowan's Grim Search from Wilds of Eldraine , for example), that card isn't a legal target for Tato Farmer's last ability
For example, Saheeli, Radiant Creator and Era of Innovation give you energy counters whenever an artificer enters the battlefield
How about casting a turn two Emrakul
An artifact for five mana, while Eldrazi Monument requires its controller to sacrifice a creature at the beginning of each of their upkeeps, it provides each creature they control with +1/+1, flying, and indestructible