Typical pillow fort works fine, but I actually think the best way to play defense here is a good offense
If you do, it's sacrificed when it enters.) Creature - Elemental Color tag templates(None) Nezahal, Primal Tide This spell can't be countered
It enables incredible mana efficiency, and I appreciate it flipping into a serious threat as Sorin, Ravenous Neonate, even if it only works in lifegain decks
That means Gideon, Ally of Zendikar adds $53.76 to the price of the average Standard deck
A 4-mana 6/6 that always makes you sacrifice a creature when it enters isnt worth it except in decks with good sacrifice fodder
If its good enough there, its bound to be a powerful strategy in Commander as well