Unable to use mana from artifacts sometimes
When I cast artifacts that produce mana now, fairly frequently they don't allow me to use the mana from them to cast other spells, sometimes as long as they are in play. Things like command tower, arcane signate, gilded lotus, ornithopter of Paradise, Chromatic lantern, and Caged Sun have caused problems that have ultimately led to me losing matches. I can even tap these items for the mana I need to cast a card and it fails to allow me to use it. When it happens, it starts the second I put one of these into play. I am getting sick of being unable to cast counters to spells or even planeswalkers and ultimately losing the match because of the bug.
![](https://secure.gravatar.com/avatar/1c74447d38ec1ec840aa5289179fa7d5?size=40&default=https%3A%2F%2Fassets.uvcdn.com%2Fpkg%2Fadmin%2Ficons%2Fuser_70-6bcf9e08938533adb9bac95c3e487cb2a6d4a32f890ca6fdc82e3072e0ea0368.png)
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Rezzahan#77802 commented
There are also cards that stop you from doing stuff on your opponent's turn. There are three rather recent cards like this: Myrel, Kutzil, and Grand Abolisher.
And just to be sure, Annul counters an artifact or enchantment spell, so can only be used in response to such a spell.
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Barkinator#70542 commented
I forget Jace has that effect so it looks like im stupid but I have had it with several different cards. I had annul ready to go the game prior to this and it wouldn't let me play it. I discarded it when given the opportunity because I was irritated by not being allowed to use it after I cast arcane Signet.
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Rezzahan#77802 commented
Well, there are no mana artifacts, so there's no telling wether this is a bug or a card effect interfering. Could be a Karn, the Great Creator, for example.
In your screenshot, though, you have no castable cards in your hand. The only card you could pay for is the Jace, and you are not allowed to cast it before your fourth turn. Says so on the card.