First, her menace ability makes her difficult to block, and when she deals combat damage to a player, she creates an equal number of 1/1 Elf Warrior tokens
Mega Zeraora ex is a Basic Lightning Mega Evolution ex with 270 HP on its base printing at 027/084, and the SIR leans all the way into that, with the card seeming to morph into the electric background around it
Not to mention that its effect is underwhelming for something that requires a whole field worth of materials (losing 800 ATK/DEF and being unable to attack directly doesn't merit the high cost.) Just having it require 1 Machine Tuner + 1 or more Psychic non-Tuners would've been fine
Even without its VSTAR Power, Charizard remains a serious threat
This SPRG exclusive fusion monster was once overlooked in favor of D/D/D Oracle King DArc
Edgewall Innkeeper was a Standard mainstay and one of the cards you least wanted to see on turn one