Whenever you take damage while you control no monsters, you can regain those life points while also special summoning a Malus token with the attack & defense equal to what you took as damage
Then the two-drop 1/3 Tinybones, Bauble Burglar has a trigger when a foe discards to exile it with a counter and then you can play them on our turn and we can use any of our mana on it, then we can tap it at sorcery speed with four to force everyone else to discard too
It was probably pushed on account of how narrow the creature type it supports is, handing out Bear-buffs like honey and playing constant board control with the fight ability.
In Journey Together we have Ns Zoroark as a new deck thats likely to shake up the meta, and now with the Team Rocket set we have the powerful Team Rocket decks that get boosted from a plethora of Rocket-specific abilities
In fact, it's so efficient it raised questions about the color pie, though personal opinion: This is well within black's grasp as far as the modern-day color pie is concerned