Blood Funnel + Memory Crystal + Urabrask // The Great Work + Seething Anger + Sedgemoor Witch

Blood Funnel

Memory Crystal

Urabrask // The Great Work

Seething Anger

Sedgemoor Witch

How it works

1. Cast Seething Anger with buyback by paying . Urabrask, Blood Funnel and Sedgemoor Witch trigger.
2. Resolve the Urabrask trigger, adding and dealing 1 damage to an opponent.
3. Resolve the Sedgemoor Witch trigger, creating a 1/1 Pest creature token.
4. Resolve the Blood Funnel trigger, causing you to sacrifice the Pest token.
5. When the Pest dies, it triggers, causing you to gain 1 life.
6. Resolve the Seething Anger spell.
7. Repeat.

This loop turns Seething Anger into an infinitely recurring engine by leveraging a clever cost-reduction overlap: Blood Funnel makes the noncreature spell cheaper, while Memory Crystal offsets the spell's buyback cost so you can cast it for just a single red mana. As you repeatedly cast the spell, Sedgemoor Witch's magecraft ability continuously generates Pest tokens to immediately feed Blood Funnel's sacrifice requirement. Meanwhile, Urabrask fuels the loop's mana and lethality by generating red mana and dealing direct damage with every single cast, letting you burn your opponents down while churning through an endless cycle of sacrifices.