Horseshoe Crab + Illusionist's Bracers + Cryptolith Rite

Horseshoe Crab

Illusionist's Bracers

Cryptolith Rite

How it works

1. Activate Horseshoe Crab by tapping it, adding .
2. Activate Horseshoe Crab by paying .
3. Illusionist's Bracers triggers, copying Horseshoe Crab's ability.
4. Resolve the copy of Horseshoe Crab's ability, untapping it.
5. Activate Horseshoe Crab by tapping it, adding one mana of any color.
6. Resolve Horseshoe Crab's ability from step 2, untapping it.
7. Repeat.