Adrenalin is a Attacker Set, it provides a boost to the REG of all Attacker type creatures.
Adrenalin I - Attacker +2 REG:[]
Adrenalin II - Attacker +4 REG:[]
Adrenalin III - Attacker +12 REG:[]
Adrenalin IV - Attacker +16 REG:[]
Adrenalin V - Attacker +20 REG:[]