Leonardo, Sewer Samurai + Solemnity + Goblin Bombardment + Kobolds of Kher Keep

Leonardo, Sewer Samurai

Solemnity

Goblin Bombardment

Kobolds of Kher Keep

How it works

1. Activate Goblin Bombardment by sacrificing Kobolds of Kher Keep.
2. Cast Kobolds of Kher Keep from your graveyard by paying 0. It will not enter with a finality counter on it due to Solemnity.
3. Repeat.

This clever loop relies on Leonardo, Sewer Samurai to cast cheap creature spells from your graveyard, utilizing the free mana value of Kobolds of Kher Keep to keep the cycle spinning. Normally, Leonardo, Sewer Samurai would brandish those returning creatures with finality counters to exile them upon death, but Solemnity steps in as a brilliant passive deterrent to completely shut down all counter placement. With Solemnity preventing those finality counters from ever touching the board, Goblin Bombardment can repeatedly sacrifice Kobolds of Kher Keep for endless damage and sacrificial triggers without ever running out of fuel.