Monstrum
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Monstrum is a latin word meaning an aberrant occurrence, usually biological.
This god starts with a quick swarm of critters, poisoning and beating down its opponent. They then mutate into stronger creatures. Twin universe is used to further breed the best "traits", copying the strongest mutants. It also uses mindgate to summon the opponent's deck against them, easily adapting to specialize in the in the destruction of any given enemy.
I know there's probably too much life quanta used to be fueled the mark, but the cockatrices and scorpions are the most important creatures at the beginning, so I wanted the guaranteed stability of the mark. Bad draws with other elements' pillars would be less significant, as their cards won't be used until later.