My friend has an Obosh, the Preypiercer companion list that did work
Its main burn effect is also incredibly bad considering it takes three level 10 monsters and Polymerization to summon it, when Superdreadnaught Rail Cannon Gustav Max takes only two level 10 monsters, doesn't need a Fusion Spell, and has a more consistent damaging effect
It could bring much-needed consistency and a resurgence to older, slower archetypes - my beloved but long-since irrelevant Madolche have been begging for a card like this, and decks like Traptrix or Fairy Tail could also make use of it - but the effect doesnt stop there
Jackal, Genius Geneticist (Simic UG) Cheap at just two mana, Jackal rewards early tempo by copying spells when you curve out efficiently
Play Trainer cards from your hand (you may only play one Supporter card and one Stadium card per turn)
The answer is probably relatively simple: once the allure of Mega Hyper Rare cards wore off, collectors simply preferred the arguably superior artwork of an SIR