With Ancient Gear Wyvern coming out, you can use this to revive it from the grave, then use it's search effect to draw AG Box, which then activates it's own search effect to get you another monster, letting you +2.
But you'll probably be using AG Wyvern to create UAGG, so Fusion Recycling Plant will do a better job by returning this card to you + polymerization from the grave.
Considering the post you responded to is a month old, it's more than likely that it was posted before Crowler was added to the gate. (And thus was a point-event unlock with Workshop as a lower reward.)
wait, are you for real? then is it bugged in me because i don't see anything like that lol 30 & 40 lvl Crowler doesn't drop it for me..