Bloodflow Connoisseur, Fiend Hunter, and Sun Titan

Prerequisites

• Bloodflow Connoisseur on the battlefield
• Fiend Hunter in hand
• Sun Titan on the battlefield
• available

Steps

1. Cast Fiend Hunter by paying its mana cost
2. When Fiend Hunter enters, its first ability triggers, exiling Sun Titan
3. Activate Bloodflow Connoisseur by sacrificing Fiend Hunter
4. When Fiend Hunter dies, its second ability triggers, returning Sun Titan from exile to the battlefield
5. When Sun Titan enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield
6. When Fiend Hunter enters, its first ability triggers, exiling Sun Titan
7. Resolve the Bloodflow Connoisseur ability
8. Repeat from step 3

Results

• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers