Give Ojer Axonil indestructible, protection from red and/or flying, if needed.
Activate Warmonger by paying {2}.
Repeat step 2 as desired.
Resolve the first Warmonger trigger, dealing 1 damage to each creature without flying and to you, and dealing damage equal to Ojer Axonil's power to each opponent.
If any opponent has 0 or less life, they lose the game as a state-based action.
Repeat from step 4 until each opponent has lost the game.

Each opponent loses the game

Near-infinite damage

Ojer Axonil, Deepest Might // Temple of Power

Warmonger

Cast Gideon's Sacrifice by paying {W}, causing all damage that would be dealt this turn to you or to permanents you control to be dealt to Crystalline Crawler instead.
Cast Warmonger by paying {3}{R}.
Activate Warmonger by paying {2}, dealing 1 damage to each creature without flying and each player.
Gideon's Sacrifice redirects damage to Crawler, which results in at least four +1/+1 counters being placed on it instead due to Vigor.
Activate Crystalline Crawler's first activated ability at least twice by removing at least two +1/+1 counters from it, adding at least {2}.
Repeat from step 3.

Infinite +1/+1 counters on a creature

Infinite colored mana

Infinite damage

Prevent all damage that would be dealt to you

Lock

Crystalline Crawler

Gideon's Sacrifice

Vigor

Cast Saving Grace by paying {1}{W}.
Saving Grace enters the battlefield attached to Crystalline Crawler, triggering itself, causing all damage that would be dealt to you or permanents you control this turn to be dealt to Crystalline Crawler instead.
Cast Warmonger by paying {3}{R}.
Activate Warmonger by paying {2}, dealing 1 damage to each creature without flying and each player.
Saving Grace's ability redirects damage to Crystalline Crawler, which results in at least four +1/+1 counters being placed on it instead due to Vigor.
Activate Crystalline Crawler's first activated ability at least twice by removing at least two +1/+1 counters from it, adding at least {2}.
Repeat from step 4.

Saving Grace

Combos with "Warmonger"