At the beginning of your end step, create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")
: Draw a card and put a +1/+1 counter on this creature.
: Add 
. This mana can't be spent to cast a nonartifact spell.")
: Draw a card and put a +1/+1 counter on this creature.