There are many uses for so-called "flicker" effects like from Essence Flux
(See the aforementioned Ghostway for ideas of other ways to keep people safe.) The only issue I have (other than a mana investment) is that it's harder to build around with things like Darksteel Forge or Bloodghast (tricks you could use with an Oblivion Stone to make things unfair)
For now, remember that including ways to reload your hand is vitally important in Commander
When its normal summoned, you can special summon any level 4 or lower monster from your hand as well
However, the market price may not tell the full story of this Lopunny card either, as the prior sales hovered around $1.12 up to roughly $2.00
Since offense and defense are determined by your hand, you can use it as a small attacker, or you can use it to adjust the level of Synchro and Xyz because your level changes with your own effects