If, during your declare attackers step, Ursine Monstrosity is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under your control continuously since your turn began (and doesn't have haste), then it doesn't attack
As such, I mentioned I was interested in testing out a Mono Black Cabal Coffers/Urborg, Tomb of Yawgmoth plan to just cast the boom booms as most of them were Black anyway
Scarlet & Violet - Prismatic Evolutions The Eeveelutions are back in the new Pokmon TCG set, Scarlet and Violet - Prismatic Evolutions
Basically, the difference is that in this version of the deck, the games where you drain them go a lot longer (though you can also just kill them with Lovestruck Beast beatdown) and draining them is the gameplan, as opposed to finishing off what the creatures already started