having an enchantment diversifies your card types, which is relevant for delirium, and being a permanent matters for cards like Muldrotha, the Gravetide and Sun Titan
Tectonic Break Tectonic Break can be the red Armageddon, and quite effective at that
Creature - Soldier Bird Akroma, Vision of Ixidor Flying, first strike, vigilance, trample At the beginning of each combat, until end of turn, each other creature you control gets +1/+1 if it has flying, +1/+1 if it has first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, vigilance, and partner
Imprint - When Clone Shell enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom of your library in any order
Once Upon a Time is at its best when the cards it can find play greatly differing roles, and a ramp deck is definitely one of the best ways to accomplish this
Gyruda, Doom of the Depths can do a lot for a little and is easy to find if you only play with even-mana cards