Ornithopter

Flying, Crew 1. Damage to Ornithopter is dealt
in the form of -0/-1 counters.
When Ornithopter is crewed, it remains a
creature until the start of your next turn. When
you crew Ornithopter, you may attach it to a
creature. That creature gains +1/+1 and
Sandwalk as long as Ornithopter is crewed, and
may reroll any dice rolls it makes once. (Creatures
with Sandwalk ignore rumble token-related effects.)