Pterodactyl
Plus on block.
It has a use.I do think it's useless. I think that as it stands, unless there's something i've missed, I've seen nothing that indicates this variation will be picked competitively outside of character loyalty or some such thing.
The rest of it was explaining why I feel it's useless since you think that it's just we don't understand things.
It gives a damage buff and it completely masks your attacks for a period of time.
It's not like he won't be able to activate it, he has a multiple projectile at varying speeds(and including one that can be stopped mid air at any time and another that is a pool of DOT on the floor) that can buy him that one second needed to activate it.
Is this better than a short period of slowed time, or stackable DOT? Probably not, but being worse than the alternatives is not the same as lacking a use.
It has a use. It does not, in fact, do nothing. It does something. It does some things.
Unless you've forgotten what the word "useless" means.