That bit of history, plus the appeal of Elsa as a character, explains why this card was sought after by investors
$0.49 Fang, Fearless l'Cie (0381 - Borderless) Final Fantasy Variants $1.79 Vaan, Street Thief (0390 - Borderless) Final Fantasy Variants $0.99 Torgal, A Fine Hound (0345 - Borderless) Final Fantasy Variants $0.49 Crystal Fragments (0357 - Borderless) Final Fantasy Variants $0.35 Prompto Argentum (0387 - Borderless) Final Fantasy Variants $0.49 Hithlain Rope The Lord of the Rings: Tales of Middle-earth Commander Decks $2.49 Noctis, Prince of Lucis (0401 - Borderless) Final Fantasy Variants $2.79 Yes Man, Personal Securitron Universes Beyond: Fallout $3.99 Squall, SeeD Mercenary (0402 - Borderless) Final Fantasy Variants $1.99 Stiltzkin, Moogle Merchant (0327 - Borderless) Final Fantasy Variants $0.39 Summon: Esper Ramuh (0367 - Borderless) Final Fantasy Variants $0.35 Omega, Heartless Evolution (0347 - Borderless) Final Fantasy Variants 0 results found

Since rats are predominantly black cards, strategies often involve generating a lot of weaker creatures and/or creature tokens so you can make a lot of sacrifices to fill up your graveyard
So, yes, you can proliferate an enemy summon to death
Lets start with Summon: G.F