
Merieke Ri Berit doesn't untap during your untap step.
: Gain control of target creature for as long as you control Merieke Ri Berit. When Merieke Ri Berit leaves the battlefield or becomes untapped, destroy that creature. It can't be regenerated.
Use Merieke's tap ability to steal the best creature on the board, then either keep it as a beater/blocker or destroy it by untapping/blinking Merieke at instant speed. You play a slow Esper control game—counters, removal, card advantage—while Merieke neutralizes one threat every turn cycle and quietly kills the strongest creatures. Win late with a few big finishers, an infinite combo, or by grinding everyone out of resources.
Add fast mana and untap enablers (Mana Vault, Thousand-Year Elixir, Aphetto Alchemist) so Merieke works every turn, plus protection like Lightning Greaves and Teferi's Protection to keep her safe. Tighten the control suite with premium counters and removal (Swords to Plowshares, Counterspell, Mana Drain) and add a compact win like Thassa's Oracle/Demonic Consultation or an infinite-blink loop with Deadeye Navigator to convert your inevitability into actual wins.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
→ Destroy any creature whenever a creature enters the battlefield, Lock
→ Destroy any number of creatures, Destroy each creature that enters the battlefield under an opponent's control, Lock
Combos via Commander Spellbook.
Same color identity (BUW), by popularity.