The Summoner Girl's Manual of Unusual Feeding

In the forty-one seconds before the contract took effect, Irosa's chanting rang across the battlefield once more: "Nine Principles," "Refracted Light," "Crow and Declaration," "Between Inside and Out"...

Unrestrained magic blazed into a light that surged skyward like a nuclear explosion. Dragons were reduced to ash by the spell, and enemies fell helplessly to their knees among the ruins. The people nearby rejoiced: "We won... Irosa won! The name of the strongest is immortalized here!"

That was the ultimate fantasy Irosa had in the second year after transmigrating from a male college student to another world.

The reality was:

She was twenty gold pounds in debt (the equivalent of 200,000 loaves of black bread) and could barely afford a meal with meat.

She had the dubious honor of becoming a [Summoner], a sewer-tier profession scorned by the nobility. Her combat power was zero, and she could only rely on drawing cards to contract creatures.

To save money, she rushed into a secondhand materials shop tucked away in a back alley and spent everything she had to put together a summoning circle.

"Gods above! A goblin or a black bear would do!"

When the light faded, kneeling in the center of the magic circle was a [Half-Elf] with even lower stats than her, a frail body, and no voice!

Irosa lost it and roared: "Aaaah! Why are you a lowly elf?!"

Still, Irosa had the talents [Contract Extraction] and [Rotten-Feed Rearing]. She could feed waste materials to the elf to improve its stats, then have those improvements feed back to her.

Who says Summoner is a trash profession? This is clearly About How I Reincarnated as a Penniless Summoner and Struggled to Survive in Another World by Feeding an Elf Waste!

(Pseudo-DnD, comedic fun, totally unhinged)