Barrensteppe Siege Abzan trigger doesn't resolve
Once the Barrensteppe Siege is on the battlefield, and you get to the beginning of your end step, and the Abzan trigger goes to resolve (regardless of how many instances are in play) they don't resolve. You don't get +1/+1 counters on any of your creatures on the battlefield. The game moves on as if it resolved, and you lose out on the effect. Womp womp.
I haven't tried it with the Mardu selection (yet), but looking at the posts that came up when submitting this bug, it appears that it doesn't.
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El-Ahrairah#33702
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