Effectively though, it turns one of your effects that would end at the end of your turn into a permanent effect, as long as it remains tapped
For Blastoise, this card regularly goes for about $600
Lillies Clefairy ex [Great to Pair With Psychic-Type Attackers and Weaken Opposing Dragon Types] Dont let the cute and cuddly appearance of Clefairy fool you, Lillies Clefairy ex is a force to be reckoned with and may give you more problems than you expect
If you don't control an Army, create a 0/0 black Orc Army creature token first.) Whenever this creature deals combat damage to a player, amass Orcs 3
Curfew ended up in this category because I moved it around a bit since it isnt technically One per Opponent and is a bit more interesting than Creatures Only. The fact that it is 1 mana is its main appeal, and thats about all it has going for it
Besides your creature being removed before the effect resolves, the other main downside of a fight effect is your creature not being big enough to kill your target