Rundvelt Hordemaster, Mortuary, and Phyrexian Altar

Prerequisites

• Rundvelt Hordemaster on the battlefield
• Mortuary on the battlefield
• Phyrexian Altar on the battlefield
• You control a nontoken Goblin that can be cast using one colored mana

Steps

1. Activate Phyrexian Altar by sacrificing a Goblin that can be cast using one colored mana, adding one mana of any color
2. The Goblin dies, triggering Rundvelt Hordemaster and Mortuary
3. Resolve the Mortuary trigger, putting the Goblin on top of your library from your graveyard
4. Resolve the Rundvelt Hordemaster trigger, exiling the Goblin and allowing you to cast it until the end of your next turn
5. Cast the Goblin from exile by paying its mana cost
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count