First thing I notice when I see Kralus was mana cost for this card is massive and have a lot of stats which is very rare to a beginner like me.
Prices
Kralus was a legendary card, the prices for this card start from $50 to $500. For a beginner like me, i would think to buy Kralus when I already know how to play and counter this card.
To rent Kralus, you can spend around 35 DEC/Day just to try it out before actually buying it. I Rent Kralus for few days to just to learn how to use this kinda card. I was very exited to try Kralus
Stats
Kralus have hugh mana cost, at 12 mana cost you can spend it on 3 or 4 cards with 12 mana cost. Besides that, Kralus have 1 Magic, 2 Melee attack, 3 Attack Speed, 5 Shield and 12 Health. As a beginner, I rarely see a card that have this many stats. Maybe thats why Kralus have that much mana cost.
My Thought
Kralus was a beast but tricky. This card is only playable when mana cap or mana limit was up to 25 or 30 in my opinion. When you force to use Kralus in low mana cap battle, maybe you will lost right away because you cant use a good support card to support Kralus as a tank. Since Kralus have a range magic attack, you can use Kralus as a second tank. I will give Kralus 7 out of 10.