Pros
-A new form of Magic Warrior Breaker
-Really decent attack points
-Works with Trample due to it's Animal-Warrior subtype

 

Cons
-Has to be a magic card
-Can only be used once per turn
-Topdecker

 

This is a simple and strange card.  This is a god-send to Trample decks that run Animal and Animal-Warriors.  This is one hell of an card... when your not topdecking.

 

Let me compare this to the card that originally created an uproar.

 

Magic Warrior Breaker.  This card is, in my opinion, near equal to Magic Warrior Breaker.  Magic Warrior Breaker has no true cost when it uses its effect and has 1900 attack points if you don't toss a magic counter.  The problem is, it can basically only use it's effect once without alot of recycling, and it becomes a 1600 monster.

 

This card has an automatic 1800, which is still very decent when you think about it.  Plus this card can re-use it's effect over and over again with a limit to once per turn.  The problem is, you have to discard a magic card, which makes this card somewhat situational.

 

As you can see, the two cards has their own weaknesses, but the fact that Sage Keiroon has the Animal-Warrior subtype makes it an awesome monster with Enraged Minotaur.  If you like to use Mad Dog of Darkness, which is a normal monster (therefore it slows down Trample decks), try taking one of them out for this thing.

 

7/10- It can be as useful as Magic Warrior Breaker, and will become a power-freak with trample compatibility.  Basically, if Breaker just makes your deck go out of theme, then use this thing.  Trample decks rule.