I see where this is going….

SOLD!

Hard to say what happens now lol, since Axe has no Void shards.

From my reading of the rule the trade post will be annulled after two days, so even if Axe has accepted early he still has two days to get a shard and swap.

“If within 2 days the named Tesser has accepted, indicated by commenting “SOLD” in the relevant post, the Tessers swap ownership of the detailed items.” I’m fairly certain that “within” just means that the trade post stays open for 2 days

I see what you mean. Technically, since no delay is given between the acceptance of the trade and the swap, that would mean either it is implicit that the trade is immediate, or that it can happen anytime in the future.

I would opt for the first version and say that the trade simply cannot happen, and you’ll have to post one again.