3BBBBB
Creature - Human Minion (1/1)
Whenever ~this~ regenerates, each opponent gets 2 poison counters
All artifact creatures gain protection from white

---

3UUUUU
Creature - Faerie Rogue (3/1)
Flying
Pay 1 life: clash with an opponent. If you win, You and target opponent each untap and gain control of two target attacking creatures the other controls until end of turn.
U: any number of target enchantments are black until end of turn

---

UUB
Creature - Merfolk Wizard (2/3)
Threshold - If you have seven or more cards in your graveyard, If ~this~ would regenerate, you may pay 4U. If you do, instead untap two target legendary libraries and return those permanents to their owner's hand

---

AlexChurchill/MagicCardGenerator