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The mantis link here doesnt work to file a bug report so please open a forum for bugs like the card Celestial Convergence doesnt exist, winters chill cant be activated during combat & natures spiral wont allow you to return a permanent from the graveyard to your hand.

Thousand year elixir doesnt work, tap creatures still have summoning sickness, the same for Dryad Arbor it too shouldnt have summoning sickness even though its both a land & a creature.

I think the same. I want to report some bugs, but the mantis link doesnt work. I guess some kind of forum here would be better, or somethng more practical.

The card ABNORMAL ENDURANCE doesnt work right. It gives +2/+0 to target creature, but if it dies, it isnt returning to battlefield after it like it should.

What game are you reporting a bug for?