Alita, Battle Angel

First Strike
When Alita blocks a creature, she gains Double
Strike until your next end step.
When Alita attacks or blocks, add x mana in any combination of {r} or {w}, where x is Alita's power.
If Alita has Double Strike, add 2x mana instead.
{6}: Alita, Battle Angel gains +1/+1 until end of
turn
You made the biggest mistake of your life, underestimating who I am.