Challenger troll bug
The green card "Challenger Troll" ability to give "Each creature you control with power 4 or greater can't be blocked by more than one creature".
This ability does not work, As i had a 1/1 thopter, chump block my Troll, this is not the first time this has happened. Wizards, have a look at this please.
1
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Rezzahan#77802 commented
A single Thopter blocked your Troll, perfectly within the Troll's blocking restriction of allowing one blocker at most for it.