Chamber Sentry You can play this on turn 1 or 2 and have it so whatever Mutates onto it will have some +1/+1 counters to boost its stats
Unfortunately, however, the latest cards to be revealed, a pair of tokens, might not be what players were hoping for
Although paying two mana instead of three like Mana Leak is easier for opponents, and not being able to counter an artifact such as a Gearhulk is a downside, I still think Revolutionary Rebuff will see plenty of Standard play
The tri-colored identity might inhibit Bladecoil Serpents use, especially if the discard mode is the most appealing to you, but perhaps Nicol Bolas or Lord Xander, the Collector players might want a way to spread that hand-shredding love to everyone, not just target opponents
Witness the rise of the humble cabbage as it becomes the most feared force at the table
Pre-set, on-theme cards for certain drops, like the Fallout Wasteland and Codex Shredder, and unrelated cards chosen from a random pool