Mylor Crowling is a Earth summoner and some say one of the best summoner available in the game
I Own this card and paid $53 for a level one version of this card only last week and it has already gone up in value by 14% so defo a great investment
As you can see from the level chart like all summoners as you level him up the monsters under him can be a higher level making your team stronger buy it would cost alot of money to level him up even to level two which would cost close to $300 at current prices so if you wanted a higher version i would consider renting
Ability
Thorns - this is a great ability all your monsters start the battle with this and if they are hit by a melee attack the card that hits them gets damaged by 2 health points so you are hurting cards even when they are striking you
So in summery this is a great summoner has very low mana cost at only 3 and gives your team a great ability for the battle at time of writing this a level one card will cost you $60 and about 40 DEC to rent where a level 4 card will set you back around $850 and 225 DEC a day
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