Celestial Mantle the new card from Zendikar reads:
Enchantment - Aura
3www
Enchant Creature
Enchant creature Enchanted creature gets +3/+ 3. Whenever enchanted creature deals combat damage to a player, double its controller's life total.
So like if you are at 15 life when you attack with the attack creature, you go up to 30 life? And then to 60?
Is this considered broken?