Carnage, Crimson Chaos, and Deceptive Frostkite

Prerequisites

• Carnage, Crimson Chaos in hand
• Deceptive Frostkite in the graveyard

Steps

1. Cast Carnage by paying
2. When it enters, it triggers, returning Deceptive Frostkite from your graveyard to the battlefield as a copy of Carnage
3. Put Deceptive Frostkite into your graveyard due to the legend rule
4. Deceptive Frostkite's enter-the-battlefield ability triggers, returning itself from your graveyard to the battlefield as a copy of Carnage
5. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers