Maulfist Doorbuster: [Category 2] ETB yield is 2 Energy for 4 mana, then you can spend 1 Energy to cause a creature not to block
Theres not much more to say here other than that if you like to play these kinds of combos, consider adding Vivien to your deck
Cerberus (0368 - Borderless) Final Fantasy Variants $2.29 Summon: Brynhildr (0366 - Borderless) Final Fantasy Variants $1.99 Excalibur II (0352 - Borderless) Final Fantasy Variants $1.79 Stiltzkin, Moogle Merchant (0327 - Borderless) Final Fantasy Variants $2.99 Gilgamesh, Master-at-Arms (0338 - Borderless) Final Fantasy Variants $0.99 Tellah, Great Sage (0349 - Borderless) Final Fantasy Variants $1.49 Sin, Spira's Punishment (0348 - Borderless) Final Fantasy Variants 0 results found
(It's not a creature.) When Enduring Courage dies, if it was a creature, return it to the battlefield under its owner's control
No matter how many activations you put on the stack, they resolve individually, growing Ob Nixilis after each one and putting it out of harms way