Unknown

Flying, Intense Heat, Infect
Enrage - Whenever Unknown takes damage put
an enrage counter on Unknown. If it has seven or
more Enrage counters remove all but one instead, transform this creature.
When this creature has 2 Enrage counters it gains
+6/+6
When this creature has 4 Enrage counters it gains Overpower
When this creature has 6 Enrage counters it gains Shroud