Where we learn how to be a better card fighter.
Yeah. That card that you took one look as and threw away as because its a Junk Rare.
"CONT [V]: This unit gets Power +1000 for each of your «Gold Paladin» rear-guards"."
This is the most important part of Agravain's effect that I would like to call attention to.
Notice that it does not have the words "On your turn", like Blonde Eizel does.
People call Agravain a "Watered Down Blonde Eizel", but I dont think so.
With its effect off, Agravain goes from a 10k squishy to a 15k Defense monstrosity.
Let me put that into perspective for you.
With 15k Defense, every attack that is not more than 20k Power can be shrugged off with a 5k Guard.
What used to be supposed to kill you: Burning Horn + Bahrs, Baromedes + Kei, Sagramore + Gareth...
Becomes just big enough to become a routine attacker.
Now, the problem lies with getting up that 8 Soul.
Gold Paladins dont have such wonderful soul charge support. The best they have is Coongal and Agravain himself.
But, actually Gold Paladins have an unseen form of Soul Charge.
Crimison Cub, Kryph, has an effect similar to Llew in Royal Paladins. By sending certain units to the soul, you can superior ride, given certain conditions.
However, both are worded in such a way that you can, in fact, use the effect knowing full well you will be not superior riding.
Now, this would normally represent a loss in card advantage, just sending 2 cards to the soul, but with Agravain, you must realize that...
Once you have activated the Vendetta Berserk, every attack's saves you 1 card.
Thus, the faster you achieve the megablast, you can shrug off everything with no problem.
Yes, you lose 2 cards. But, this represents a 2 turn faster megablast, a 2 turn faster 15k defense, and... given they attack with 3 units, saving 3 * 5k * 2 turns. A whooping 30k worth of cards.
Re-riding Agravain just for the extra soul is another choice.
I hope you now see the worth in Agravain. 17k on the attack and 15k on the defense is crazy enough. A double crit simply means you can dedicate part of the deck/your play to stand style stalling.