Cast Searing Touch with buyback by paying . Storm-Kiln Artist, Blood Funnel and Judith trigger.
Storm-Kiln Artist triggers, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Resolve the Judith trigger, creating a 2/2 Imp creature token.
Resolve the Blood Funnel trigger, causing you to sacrifice the Imp.
When the Imp dies, it triggers, dealing 2 damage to each opponent.
Resolve the Searing Touch spell.
Repeat.
This clever loop turns the humble burn spell Searing Touch into a relentless engine of destruction by heavily discounting its casting and buyback costs. With Blood Funnel lowering noncreature spells by {2} and Memory Crystal reducing buyback costs by {2}, casting Searing Touch with its buyback becomes completely free, costing only the {R} you get right back from Storm-Kiln Artist's magecraft trigger. As a built-in sacrifice outlet, Blood Funnel's counter-unless-you-sacrifice clause is neatly satisfied by the 2/2 Imp token generated by Judith, Carnage Connoisseur whenever you cast an instant or sorcery. Every single iteration of this cycle sacrifices that token, triggering its 2-damage death ability to continuously pummel your opponents while cycling Searing Touch endlessly back to your hand.