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Describe the Bug:
When Barbarian Guides ' activated ability is activated, it doesn't let the player choose a land type and doesn't ask for targets. It just resolves and seemingly does nothing.

Which card did behave improperly ?
Barbarian Guides

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
BotG v2, duel

What exactly should be the correct behavior/interaction ?
Barbarian Guides ' ability works.

Are any other cards possibly affected by this bug ?
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Edit1: confirmed by BAgate; Edit2: changed thread title to match new report guidelines

Fixed b38d3cd.

If this is an engine limitation, feel free to yell at me.

When you activate Barbarian Guides you choose a land via the normal 'wheel' and target creature gets snow 'chosen land' walk (ex. choose plains and creature gets snow plains walk). But what about other lands? Ex. AI had a Plains and an Arctic Flats, I used Barbarian Guides to give a creature enchanted with Lure snow plains walk and he was unblockable (despite AI not having any snow plains), but snow swamp walk and he could be blocked. Meanwhile there was no way to choose Arctic Flats, which is a snow land.

Is this a remnant of all basic lands being considered snow lands?

Arctic Flats isn't a land type, so it can't be chosen. It's exactly analogous to the rulings for Illusionary Presence and Shimmer. You could choose e.g. snow-covered Power-Plant or snow-covered Locus through a menu like we have for Shimmer, but since none of the non-basic land types are inherently Snow, I figured that a possible interaction with Rimefeather Owl wasn't worth using the worse interface.

All basic lands are still their snow-covered versions by design.