Engorged Mire Tick

When Engorged Mire Tick enters the battlefield enchant creature that would have dealt damage
to Mire Tick.
At the beginning of your end step, add a -1/-1
counter to enchanted creature.
When enchanted creature dies, you gain life equal
to the number of -1/-1 counters that were on enchanted creature and you may pay {b/g}{b/g}. If you
do, transform Engorged Mire Tick and return it
to your side of the battlefield, tapped.