Elindra & Her Warg

Double Strike, Haste, Trample, Vigilance, Hexproof,
Menace
At the beginning of each upkeep, you may put X +1/+1
counters on Elindra & Her Warg, where X equals this
creature's power; if you do, Elindra & Her Warg may not
be assigned to attack or block until your next turn unless
it attacks or blocks alone. As long as it your turn, this
creature gets +6/+6 and has Indestructible and Lifelink.
Whenever this creature defeats a player without being
blocked, there is an additional combat phase af