Thorn, Superior Image

Flying, Vigilance, Trample
Thorn's power and toughness are equal to
the number of dragons you control.
Whenever another creature you control attacks,
put a +1/+1 counter on it.
Whenever a dragon you control gains a
+1/+1 counter, scry 1, then draw a card.
Creatures with +1/+1 counters you control have vigilance.