Adding abilities after humility

[Tharkon]

I played humility.
Then I created a 1/1 soldier token with [[Elspeth, Knight-Errant]].
I then played [[Gleam of Authority]] on the token, giving it vigilance and "{W}, {T}: Bloster 1."
This all worked fine, I attacked with it, tapped it for its ability.
AI Opponent took control of it with Vedalken Shackles and then released control of it again a turn later. (AI seems to always untap Vedalken Shackles every turn, but that's not relevant here.)
Next turn when summoning sickness wore off I attacked with and noticed it didn't have vigilance any more, nor did it have its tap ability.
It did still have Indestructible from Elspeth's emblem.

I believe, correct me if I'm wrong, that as long as the aura comes in play after Humility does, it will grant the ability after Humility has had a chance to remove it, which seemed to work for a while but then stopped working.

[jeffwadsworth]

[[Humility]] [[Gleam of Authority]] [[Elspeth, Knight-Errant]] [[Vedalken Shackles]]

[github-actions]

Humility - (Gatherer) (Scryfall) (EDHREC)

{2}{W}{W}
Enchantment
All creatures lose all abilities and have base power and toughness 1/1.

Gleam of Authority - (Gatherer) (Scryfall) (EDHREC)

{1}{W}
Enchantment — Aura
Enchant creature
Enchanted creature gets +1/+1 for each +1/+1 counter on other creatures you control.
Enchanted creature has vigilance and "{W}, {T}: Bolster 1." (To bolster 1, choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)

Elspeth, Knight-Errant - (Gatherer) (Scryfall) (EDHREC)

{2}{W}{W}
Legendary Planeswalker — Elspeth
4
+1: Create a 1/1 white Soldier creature token.
+1: Target creature gets +3/+3 and gains flying until end of turn.
−8: You get an emblem with "Artifacts, creatures, enchantments, and lands you control have indestructible."

Vedalken Shackles - (Gatherer) (Scryfall) (EDHREC)

{3}
Artifact
You may choose not to untap Vedalken Shackles during your untap step.
{2}, {T}: Gain control of target creature with power less than or equal to the number of Islands you control for as long as Vedalken Shackles remains tapped.

[jeffwadsworth]

This worked fine for me. It kept Vigilance and the ability given by the Gleam of Authority.

[Tharkon]

I have done some more testing and it seems the abilities disappeared when I played [[Legion's Landing]]. I can't remember if I played that last time as well but I can reproduce it with Legion's Landing now rolling back the turn and replaying it consistently removed both the abilities granted by Gleam of Authority and [[Intangible Virtue]]. However I was not able to reproduce this in a test game so it might not be Legion's Landing specifically but some combination, or maybe some specific board state that triggers it.

Anyway, here's a video that shows the bug when it happened with Legion's Landing. https://www.youtube.com/watch?v=_CsM8tNVjd0. You can see the bug happening right near the start, though I did not notice that whilst playing until a bit later.

[github-actions]

Legion's Landing // Adanto, the First Fort - (Gatherer) (Scryfall) (EDHREC)

{W}
Legendary Enchantment
When Legion's Landing enters the battlefield, create a 1/1 white Vampire creature token with lifelink.
When you attack with three or more creatures, transform Legion's Landing.
🔄
Legendary Land
(Transforms from Legion's Landing.)
{T}: Add {W}.
{2}{W}, {T}: Create a 1/1 white Vampire creature token with lifelink.

Intangible Virtue - (Gatherer) (Scryfall) (EDHREC)

{1}{W}
Enchantment
Creature tokens you control get +1/+1 and have vigilance.

[jeffwadsworth]

Whoa. How about doing a simple test where just the relevant cards are being tested. That screen is impossible to decipher in regards to timestamps, etc.