Nim Deathmantle + Krark-Clan Ironworks + Breya, Etherium Shaper

Nim Deathmantle

Krark-Clan Ironworks

Breya, Etherium Shaper

How it works

1. Activate Krark-Clan Ironworks by sacrificing Breya, adding CC.
2. When Breya dies, Nim Deathmantle triggers, causing you to pay 4 to return Breya from your graveyard to the battlefield and attach Nim Deathmantle to it.
3. When Breya enters, it triggers, creating two artifact creature tokens.
4. Activate Krark-Clan Ironworks by sacrificing a creature token, adding CC.
5. Repeat.

This loop relies on a clever cycle of sacrifice and rebirth to endlessly churn out resources using the mana engine provided by Krark-Clan Ironworks. When you sacrifice Breya, Etherium Shaper to the Ironworks for mana, her death triggers Nim Deathmantle, which provides the exact amount of mana needed to pay its resurrection cost and re-equip her. Every time Breya returns, her entry ability spawns two Thopter artifact creature tokens, which can then be sacrificed to the Ironworks to generate the surplus mana needed to sustain the loop while netting you an infinite supply of death, entry, and sacrifice triggers.