That means you can just delete a creature your opponent controls even if youre tapped out of mana
It's super flexible, as you can use it when your own horde swings in, or when another player goes in on the offensive (they don't even have to be sending everything/anything at you.) However, while I can see this card working pretty well in any blue/white/green tokens deck, it's obviously best with an MTG commander that cares about birds
Additionally, we wont be considering reprints for this ranking, but some very strong ones are appearing in this set
Confirming the card number and treatment before looking at any price removes most of that error
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
It only takes one mill-10 trigger with the monarch to make this card worth its in a graveyard deck