We needed to find a way to do them again in a way that didn't make the block feel like it was just regurgitating Onslaught
The main problem is that most Dragon decks are already full to the brim with excellent cards, so it'd be hard to justify cutting cards to make room for this one since it's a lot more situational than Dragons' usual fare
Perhaps they sacrifice something with stun counters or their +1/+1 counter-pumped creature gets removed, each of these situations results in treasure for you, so it absolutely feels like you're stealing
Imprinting it on an Isochron Scepter will let you access the effect on demand, which lets you tactically deny your opponents mana on key turns
CROSS DUEL for the first time and announced Yu-Gi-Oh
This is a calculated tradeoff when considering the improved usability, learnability, and efficiency gained