Antler Skulkin, Ashnod's Altar, and Kinsbaile Borderguard

Prerequisites

• Antler Skulkin on the battlefield
• Ashnod's Altar on the battlefield
• Kinsbaile Borderguard in hand
• You control at least one additional Kithkin
• available

Steps

1. Cast Kinsbaile Borderguard by paying , causing it to enter the battlefield with at least one +1/+1 counter on it
2. Activate Antler Skulkin by paying , giving Kinsbaile Borderguard persist until end of turn
3. Activate Ashnod's Altar by sacrificing Kinsbaile Borderguard, adding
4. When Kinsbaile Borderguard dies, its persist ability triggers, as well as its second ability
5. Resolve the second trigger, creating a number of 1/1 Kithkin Soldier creature tokens equal to the number of counters on Kinsbaile Borderguard
6. Resolve the first trigger, returning it to the battlefield from your graveyard with at least one +1/+1 counter on it due to its ability
7. Repeat

Results

• Infinite +1/+1 counters on Kinsbaile Borderguard
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers