While theres some ingenuity in the way Hullbreacher/Narset players can weaponize Echo of Eons to end a game, the way asymmetrical effects wreck otherwise balanced cards could end up curtailing the design space available to future sets
Mudbutton Torchrunner This is the most joyous goblin to ever live, and it knows that its star shines too bright
The breakout potential here is quite high
I haven't been able to find the exact odds of finding an anime card in these wildcard slots (which can also contain Borderless, Jumpstart, or Commander cards in some packs), but WotC's article describes said odds as small. In the case of Collector boosters, they have two slots with a chance to drop an anime Enchanting Tales card: The Non-foil rare or mythic rare Enchanting Tales slot, in which odds for a rare anime card are 6.7% and odds for a mythic rare anime card are 10% (while the remaining 83.3% of the time you'll get a regular Enchanting Tales card in this slot, either a rare or a mythic rare)
These full-art cards feature bold, pop-art styling and retro katakana attack text some of the most visually distinct cards in recent TCG history