Sabrina's Kadabra (Gym Challenge card #58) has an attack called Life Drain, which reads; Flip a coin.  If heads, put a number of damage counters on the Defending Pokemon so that its remaining HP are 10.  This attack only requires ONE PSYCHIC ENERGY!
My question is... if I attach a Plus Power to Kadabra, will it automatically kill the Defending Pokemon?!  (With Heads).
If so, also attaching a Sabrina's ESP (from Gym Heroes) makes this card super lethal!!!!

No.  Plus Power adds to damage if damage is dealt.  Life down puts damage counters on a Pokemon, but does not deal damage.  Kinda tricky, but this is NOT a combo.

Scott