There are some more minor options in Red and Black utilizing more of a ritual-style ramp effect, but outright ramps is a bit more of a rarity, especially on ETB creatures
Orzhov tokens in particular is usually focused on death-by-one-thousand-cuts (if it isnt looping Gary), but Fell Beast quickens the clock considerably, doming an opponent for a chunk on entry and sticking around to keep going
No, you cannot currently trade up any common or uncommon wildcards in exchange for rare or mythic wildcards
Dungeons & Dragons Theme : The Draconic Rage deck is infused with the flavor of Dungeons & Dragons, featuring iconic dragons, spells, and mechanics from the Forgotten Realms
TappedOut has a good deck building interface and youve got a lot of control over how you sort out the decklist as youre building it, and changing things up is pretty easy
I may be underestimating how important Insidious Fungus is and should have it higher on the list