Forbidden Tree

Reckless - Units with Reckless must attack.

Berserk - Units with Berserk can make a special double attack one time: If it survives the first round of battle, it will attack again. This can only be used once, and gives the unit Reckless.

Amplify - Cards with Amplify will let you repeat their effect when played if you have the extra power specified by the Amplify number. It is optional and may be used more than once.

Regen - The first time this would be dealt damage, prevent all of it.