Morph has no broader equivalent aside from, perhaps, colorless or vanilla, neither of which would have been viable attempts at the time in the context of the deck
Mana abilities are a special set of activated abilities that generate amounts of mana, like tapping Llanowar Elves to generate , or a Sol Ring to generate 2 colorless mana
Within those sets of inks are cards that are catered to specific play styles, so there are top cards in each ink type that perform extremely well
Four life per connection which can be as much as 8 life per turn with re-equips for blocks or double strikers is a fair old chunk
My Wife, Daughter & I have been going crazy with MTG, Yugioh, Lorcana & Pokmon
Large numbers of small creatures with a self-destruct mechanic would be their core gameplay gimmick, but maybe they could also be the setting's obligatory "tinkers," possibly using their own acid as fuel for all manner of weapons and war machines