mimikyu holographic card Pokemon TCG - Trick or Trade (Stamped) 097/193 end display Team Rocket's Mimikyu Pokemon Ascended

That's part of it, and that's one of the major reasons it is still getting played today

Triggered abilities of colorless spells

The main advantage it has over Magicians in World's format is the lower reliance on Electrumite

The thing holding it back is simply that it is pretty fair compared to the other stuff the deck can play, especially at the 3 mana slot

Anyway, back on topic, all Ramp decks since the beginning have looked to build their mana to ridiculous levels as quickly as possible and then use that advantage to drop more powerful win conditions earlier than their opponent and ride that to victory

8 Hardened Scales Hardened Scales is incredibly powerful for its mana cost