Mikaeus, the Unhallowed + Kaervek, the Spiteful + Cryptic Trilobite

Prerequisites

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Steps

1. 1Cast Cryptic Trilobite for X = 0 by paying .
2. 2Cryptic Trilobite dies due to having zero toughness.
3. 3Cryptic Trilobite's undying ability from Mikaeus triggers, returning it to the battlefield with a +1/+1 counter.
4. 4Activate Cryptic Trilobite by removing the +1/+1 counter from it, adding that can only be spent on activated abilities.
5. 5Repeat from step 2.

Effects

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