Carth the Lion, Wrenn and Realmbreaker, Lotus Petal, and The Chain Veil

Prerequisites

• Carth the Lion on the battlefield
• Wrenn and Realmbreaker in hand
• Lotus Petal in the graveyard
• The Chain Veil on the battlefield
• available

Steps

1. Activate The Chain Veil by paying and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn
2. Cast Wrenn and Realmbreaker by paying
3. Activate Wrenn and Realmbreaker's first loyalty ability by putting two loyalty counters on it, causing a land you control to become a 3/3 Elemental in addition to its other types
4. Activate Wrenn and Realmbreaker's third loyalty ability by removing six loyalty counters from it
5. Wrenn and Realmbreaker dies as a state-based action due to having zero loyalty
6. Resolve the Wrenn and Realmbreaker ability, causing you to get an emblem
7. Cast Lotus Petal from your graveyard by paying
8. Activate Lotus Petal by tapping and sacrificing it, adding one mana of any color
9. Repeat from step 7

Results

• Infinite casts of permanent spells in your graveyard
• Infinite colored mana
• Infinite storm count