Or rather, all creatures, if youre the monarch
If you gain some life, you get energy, and you can use that energy to pay into the X part f the cost instead of mana
his/her signature pose
Day of the Dragons is pricey in terms of casting cost, but does triple duty here: it almost always upgrades the stats of your creatures, it protects your team from a board wipe, and you can bounce it with something like Blink of an Eye to flash your team back in and trigger their abilities at instant speed
Consider the way Iname, Death Aspect stocks your graveyard with Spirits to recur, to give you fuel for the Spiritcraft fire, while Iname, Life Aspect Regrowths them all to your hand, with its ueber-Spiritcraft ability
By focusing on its third and fourth ability, you can fairly easily mitigate any incoming attacks or hostile interactions or swap over to some politics-play to grant your opponents creatures haste and trample or +1/+1 counters