Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient

Prerequisites

• An opponent cannot block and kill Klauth or Soul of Windgrace.
• Soul of Windgrace does not have summoning sickness.
• You have at least one land card in your graveyard.

Steps

1. 1Declare Klauth and Soul of Windgrace as attackers, triggering their abilities.
2. 2Resolve the Klauth trigger, adding at least that can only be spent to cast spells.
3. 3Resolve the Soul of Windgrace trigger, returning a land card from your graveyard to the battlefield tapped.
4. 4Move to your postcombat main phase.
5. 5Cast Waves of Aggression from your graveyard for its retrace cost by paying and discarding a land card, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
6. 6Repeat.

Effects

• Infinite colored mana that can only be spent to cast spells
• Infinite combat phases
• Infinite magecraft triggers
• Infinite self-discard triggers
• Infinite storm count