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
Meanwhile, Uncivil Unrest is a terrifying red card - a bit pricey on the mana, but the haste-enabling, damage doubling potential is off the charts
There are also some control decks that slowly chip away at their opponents over time rather than going for big plays at the end, but these are less common
The Werewolf mechanic isn't keyworded or even named, but it's as much a part of the design as flashback, morbid, or even transform
So, the story starts out here as a reference to The Fly , where Jeff Goldblums character turns to experimenting on himself in a similar manner and ends up turning himself into a horrifying human insect hybrid