As a card advantage machine that's uncounterable and hard to remove from the board, it's great in all assortment of creature decks, especially token-flavored ones
For example, thanks to the straightforwardness of its win-con and its limited requirement for tracking counters or triggered/activated abilities, Limit Break is likely going to be the best choice for new MTG players who are drawn to the game thanks to their love of Final Fantasy
His power is entirely conditional on you playing a deck full of otherwise weak cards
If you are mostly tokens and enchantments then Mother is poor while if you have all the Blood Artist dudes or the prowess token generators Mother will be yet another must kill cheap dork and will absolutely steal some games
This is our first Arena Direct event with the recently announced event structure changes, so check out that article (plus the terms and conditions page) for all the details
If it becomes a creature (most likely through its crew ability), it will have that power and toughness