Othelm, Sigardian Outcast, Bloodspore Thrinax, Thornbite Staff, and Cryptic Trilobite

Prerequisites

• Othelm, Sigardian Outcast on the battlefield
• Bloodspore Thrinax on the battlefield
• Thornbite Staff on the battlefield
• Cryptic Trilobite on the battlefield
• Thornbite Staff attached to Othelm
• Othelm does not have summoning sickness
• Bloodspore Thrinax has at least two +1/+1 counters
• Cryptic Trilobite has at least one +1/+1 counter

Steps

1. Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding that can only be spent to activate abilites
2. Repeat step 1 until Cryptic Trilobite dies as a state-base action due to having zero or less toughness
3. Othelm triggers, untapping itself
4. Activate Othelm by paying and tapping it, returning Cryptic Trilobite from your graveyard to the battlefield tapped with at least two +1/+1 counters on it
5. Repeat

Results

• Infinite colorless mana that can only be spent to activate abilities
• Infinite death triggers
• Infinite ETB
• Infinite LTB