Kronnen

Background

For Kronnen, a moment's carelessness has carried with it a heavy price. An insect went through the Vortex at the same time as him, causing them to fuse into a strange mutant creature. The creature hasn't yet fully evolved but for the time being it still obeys orders and is fighting better than ever before.

Advantages & Disadvantages

Advantages:

His base power is 8, which is good for a 4*.
His base damage is 3, but becomes 5 with fury, allowing you to 2HKO with other members of Vortex.
His ability gives you three life back after you've won with him.
His ability helps to create a gap between you and your opponent.
The clan bonus gives you 2/3 pillz back after you lose with him.

Disadvantages:

His base damage is 3, which is very low for a 4*.
His ability is Revenge-based, meaning you must take damage for it to activate.
His ability also makes him predictable.
Like other Vortex members, he's weak against SoB, since he loses his bonus.
He is also weak against SoA, since he loses his ability, which diminishes his value.
He is a 4*, so he takes up room in your deck.
He has competition from the other 4* in Vortex.