GGG's Ancestor event FAQ updated
Sorry, Standard players.
New FAQ line:
Will I be able to use Ascendancy Tattoos in Standard after the event?
No, Ascendancy Tattoos are exclusive to the event league.
Source:
https://www.pathofexile.com/forum/view-thread/3968867
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Quick comment on this: this is for the best, it was going to warp the event economy if a small number of Standard-motivated players very aggressively bought up these items.