Ultima Blight Counter Not Working Properly on Urborg
I put one of Ultima, Origin of Oblivion's blight counters on Urborg, Tomb of Yawgmoth and the other lands remained swamps. Did not confirm if bug was solely visual or mechanical as well.
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AsterosVerlian#99860
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Rezzahan#77802
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Not a bug. Since Urborg and Ultima's ability change card (sub)types, so both effects apply in the same layer. With no dependency present for the two effects, they are applied in time stamp order, so Urborg first, then Ultima. The "loses all abilities" is a layer 6 effect, and always applies after type changes, which happen in layer 4. Only the "loses all land types" part of Ultima's ability applies in layer 4.
End result, Urborg is not a Swamp and can only tap for colorless mana, all other lands are Swamps in addition to what they were and can tap for B.