Arialus, White Knight of Aspen

When this creature enters play, Play 3 "of Aspen" creatures from your hand or deck with cost equal
to how many energy cards you have in play.
This card gains gains the following abilities
depending on how many "of Aspen creatures you
have in play other than this card:
•1+ This card gains Indestructible ability.
•2+ Once per turn, send 1 creature from your
deck to the discard pile, this card gains +3/0
•3+ Neighboring creatures gain Skirmish
ability.