Cadric, Soul Kindler, Relic of Legends, and Saffi Eriksdotter

Prerequisites

• Cadric, Soul Kindler on the battlefield
• Relic of Legends on the battlefield
• Saffi Eriksdotter in hand
• available

Steps

1. Activate Relic of Legends' first ability by tapping it, adding
2. Cast Saffi Eriksdotter by paying
3. When Saffi Eriksdotter enters the battlefield, Cadric triggers
4. Holding priority, activate Relic of Legends' second ability by tapping Saffi Eriksdotter, adding
5. Resolve the Cadric trigger, causing you to pay to create a token copy of Saffi Eriksdotter
6. Activate Relic of Legends' second ability by tapping the Saffi Eriksdotter token, adding one mana of any color
7. Activate the Saffi Eriksdotter token by sacrificing it, targeting the nontoken Saffi Eriksdotter
8. Activate Saffi Eriksdotter by sacrificing it, targeting Cadric
9. When the nontoken Saffi Eriksdotter dies, the token Saffi Eriksdotter triggers, returning the nontoken Saffi Eriksdotter from your graveyard to the battlefield
10. Repeat from step 3

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers