Atraxa, Praetors' Voice

This deck focuses on +1/+1 counter synergy and many aggressive, two-card combos that provide infinite damage to any target, infinite life, infinite turns, or on-the-spot wins. This deck aims to win around turn 5-6 in an ideal scenario.

Combo 1:

Heliod, Sun Crowned (with lifelink activation targeting Ballista) + Walking Ballista (with two +1/+1s on it) = Infinite damage to any target

Combo 2:

Spike Feeder + Archangel of Thune = Infinite life gain, and infinite +1/+1s on all your creatures other than Spike Feeder

Combo 3:

Spike Feeder + Heliod, Sun Crowned = Infinite life

Combo 4:

Sage of Hours + Ezuri, Claw of Progress (with 5 XP counters, putting 5 +1/+1s on Sage each turn) = infinite turns

Combo 5:

Simic Ascendancy + Body of Research (with 20+ cards in library) = win the game at the next upkeep

Combo 6:

Jace, Cunning Castaway + Doubling Season = Infinite 2/2 tokens

Combo 7:

Simic Ascendancy + Doubling Season + Kalonian Hydra, Primordial Hydra, Managorger Hydra, or Forgotten Ancient= Very quick counters on Simic Ascendancy for the win (+1 counters first double on the creature, then growth counters take that number and doubles again on Simic Ascendancy).

Combo 8:

Defense of the Heart + opponent has 3+ creatures = play an above two-creature combo for free, most likely Spike Feeder + Archangel of Thune.

Combos that aren't currently included in the deck:

Redundant combo pieces like Triskelion (Walking Ballista) and Mikaeus, the Unhallowed (Heliod, Sun Crowned) have been redacted, but could give a win on the spot with Defense of the Heart. In the deck’s current state, the CMC of Triskelion and Mikaeus, the Unhallowed is too high when considering Dark Confidant and Ad Nauseam.

Alternate Combo 1:

Emiel the Blessed + Peregrine Drake = Infinite mana + infinite ETB + infinite +1/+1s

Alternate Combo 2:

Rite of Passage or Vigor + Triskelion or Walking Ballista + Doubling Season, Hardened Scales, Conclave Mentor, Winding Constrictor, or Pir, Imaginative Rascal = Infinite damage to any target

Alternate Combo 3:

Magistrate's Scepter (with 4 counters) + Vorel of the Hull Clade = infinite turns