the phlange god

Each turn during your upkeep you may sacrifice this card or shuffle it back into your deck
Each turn during your end step, if you control 2 or more phlange creatures, you may activate one of the following effects
•if your life total is currently higher than target opponent's life total then each player loses half of their current life total rounded up
•if your life total is currently lower than your opponent's life total you may gain life equal to half of target opponent's current life total