Nemesis

{1}: Flowstone Thopter gets +1/-1 and gains flying until end of turn.

Whenever Flint Golem becomes blocked, defending player mills three cards.

At the beginning of your upkeep, if you control seven or more permanents, return Complex Automaton to its owner's hand.

At the beginning of each opponent's upkeep, Rackling deals X damage to that player, where X is 3 minus the number of cards in their hand.

At the beginning of each opponent's upkeep, Viseling deals X damage to that player, where X is the number of cards in their hand minus 4.

{2}: Target creature gains flying until end of turn. {5}, {T}: Destroy target creature with flying.