This card sounds quite fun as a Shaymin EX alternative. The things I didn't like about Shaymin was all the consequences of using it:
-2 Prizes is a great burden to me and makes it too easy to lose from a single Lysandre.
-Most often, you'd need to use Ultra Ball to get it out, and this ended up wasting too much resources for my taste just to draw for cards.
-You have to rely on your hand itself in order to get it, and doesn't help when your hand is dry and don't have the cards to get it out.
-I often found that if you put in 2 or more of them in a deck, the bench space wares thin unless you play Sky Field.
Things about Octillery:
-Very easy to get out with Dive/Level Ball
-Draw is consistent every turn once it's out, even if it is 5 cards, and if you're desperate, It looks like it could stack.
-It might have great synergy with the Judge card coming back with this set.
-It could easily get you out of Ace Trainer jams.
-90 HP isn't that great, nor is its attack. But by only giving up 1 prize, it creates a dilemma for the opponent about either using Lysandre to take it out, or the 2 prize EX.
We will have to see how it will work out in this regard... But it looks quite positive for draw support to me.