The Planar Stones

At the beginning of your end step choose one:
• Gain 1 life equal to your devotion to white.
• Draw cards and then discard cards equal to
your devotion to blue
• Put a -1/-1 counter on any number of target creatures equal to your devotion to black.
{bull} The Planar Stones deals damage to any number
of target creatures equal to your devotion to red.
{bull} Put a +1/+1 counter on any number of target creatures equal to your devotion to green.