Fist of Suns and Morophon are one way to make Tiamat and her brood cost practically nothing, Cavern of Souls can help make your dragons uncounterable, and better real estate like the Triomes (or shocks and fetches) can beef up consistency where mana is concerned
Borderless Raised Foil Avatar Aang The only raised foil card in this set, Avatar Aang / Aang, Master of Elements is the chase card of Avatar: The Last Airbender
Destined on the stack is still a black instant with a converted mana cost of 2, and Lead on the stack is still a green sorcery with a converted mana cost of 4, but Destined to Lead, any time it's not one or the other, is a black and green instant sorcery with a converted mana cost of 6
Feather, Radiant Arbiter Feather, Radiant Arbiter has quite the separation from the more famous Feather in Feather, the Redeemed
Not only does it provide an untap just for attacking, it gives a +2/+2 buff, and Totem Armor, whichll save your fattie from a board wipe