For four-mana, you drain one of your opponents of two life, and then you gain two life
In some duels, the terrain starts already altered
Still, none can deny just how many games a Hammer ambush can win, making it a great card to build a deck around
The major constraint on it is needing ample 1/1 creatures to pump, but plenty of Selesnya decks produce saprolings, soldiers, and humans with that stat line to make Bess swole and your little 1/1s equally large
In both continuities, Utopia is the only one who sides with Yuma and Astral - the only two people immune to the uncontrollable corruption of Number possession for differing reasons - and chooses to stay beside them while the other Numbers have a consistent urge to possess people and cause chaos with those peoples' unhinged wishes
This will likely remain the case going forward as well, unless an even more lucrative classification of card comes to the Pokmon TCG when the Scarlet and Violet sets release