Imagine Dragon

Flying, Indestructible, Dangerous (that creature
must be blocked)
When Imagine Dragon deals combat damage to
a creature, it loses the number of target abilities
equal to the number of counters +1/+1 on the
Imagine Dragon.
When Imagine Dragon becomes the target of a
spell or ability, put +1/+1 counter on it.
"It circled over our heads and we in fear forgot
everything we knew."