Sometimes the best offense is a good defense. Nothing rings truer than U.A Perfect Ace and his ability to close out the inning for the Ultra Athletes.
You can Special Summon this card (from your hand) by returning 1 “U.A.” monster you control to the hand, except “U.A. Perfect Ace”. You can only Special Summon “U.A. Perfect Ace” once per turn this way. Once per turn, during your opponent’s turn, when a card or effect is activated: You can discard 1 card; negate that activation, and if you do, destroy it (this is a Quick Effect).
I mentioned before that the idea behind U.A. is to field your offense then, during main two, use their tag-out ability to field any defensive options you may have. But Ace isn’t something that you really cycle out of if a better option doesn’t exist.
At the cost of one card you can just say no on your opponent’s turn to an effect/card activation. Now this doesn’t count on your turn so it’s not a really robust defense. But even still, sometimes you just need that one strike out to jam up the other guy’s plan.
And presuming you sit on that 2500 DEF for two turns while you’re still tagging in and out with U.A.s, his attack will catch up quickly and now you can put this guy in attack mode and join in on the offense.
Of course a clever opponent will try to bait out the neg so you end up wasting your defensive play. And honestly the problems that he causes just being on the field – making your opponent have to think and rethink every play is a good element to bring to the game.
Dark Lord Kasim of the Darth Bane novels spoke of double ended lightsabers not being twice as dangerous as a single blade “but your adversaries believe so, so the effect is the same”. Ace can’t stop every play, or their best play, or what have you but if the other guy starts thinking it and it gets in their head – even though you can’t beat everything, they’ll play like you can.
A great pitcher knows it’s as much in the mind as anything else. Get in that player’s head and you’ve won before the game’s over. And you could very well end up pitching a no-hitter.