Seems to have been specifically removed from the legacy card vault. Feel a bit deceived having saved up for weeks (and made cash purchases just for the purple crystal addition) to find the card we all want selectively removed without notice.
They could update to 3.3 and give us new cards but this is the change they chose to make. Way to go Oktagon 
I’m not entirely sure what you mean here. The legacy Elite Boosters rotate weekly. This week we got a HOU pack but this is not the HOU pack that contains Omni. Omni is in a different HOU Elite Booster which we will very likely see again at some point in the future.
The cards you should really be complaining about are the swords. To my knowledge, those have never been in an Elite Pack. The Elite Pack seen above was last in the vault on Jan 1. Thanks to @fiirst for compiling this info.
The swords were in elite packs. Just way back during the relevant block in the original EP functionality. They have not appeared since then (yet).
My apologies, I happily retract my statement.
I thought there was only 2 HOU elite set rotations not 3. It’s been a long time and didn’t screenshot the elite pack last time it was around, I’m glad someone did though.
But yeah, haven’t seen swords since prior to booster crafting, that’s a good point
I would definitely be trying for the swords were that an option.
@NinjaE we just had swords in rotation when the AER EP rolled through last month.
No. Swords in non dupe EP never enter the vault yet.
FYI, HOU EP pre non dupe and HOU EP post non dupe arent same. (They also apply the changes to KLD, AER & AKH as well).
A good point, so when were your screenshots taken?
Finally! the EP ss is utile 
@ZW2007
I started ss since GRN released.
There are olpie EP’s piece of information in the forum, in @sjechua 's ep poll