The end result
You give yourself some powerful late game options as well as potential infinite turns courtesy of Time Sieve
In all honesty they just aren't good enough in Legacy, with only two decks each present in our 600+ deck sample
We all thought battles would be revealed in All Will Be One, yet no battle card appeared until March of the Machine
Dealing X damage to each opponent and each creature they control is often a reset that favors the caster, especially when your deck is built to recover faster and in some cases, can burn whatever life totals your opponents have to zero
Instead, we'd need to compare Hearthstone to Magic Online , and there simply isn't a way to do this comparison justice in this article without going way too long and becoming way too convoluted, especially considering the complexity of the comparison, since Magic Online cards have real value while Hearthstone cards are untradable