That was, in a few words, swapping its commander from Szarek to Imotekh the StormlordImotekh the Stormlord
Next you can go either two ways, If you have any of the most expensive MTG cards, you can get in contact with us and we can make you an offer for your cards based on condition, or you can send your card to be professionally evaluated
Having old drivers installed in your PC (specifically for your graphics card and/or network adapter) can also be one of the causes
They typically say something along the lines of whenever you draw a card and there are even cards that care about when you draw your second card each turn but those get their own list and you absolutely should read it after this one
Aether Storm in Homelands had the text: No summon spells may be cast. In future reprints, it changed to creature spells cant be played. The first version of Future Sight stated that you can play the top card of your library. This terminology caused some confusion because play has multiple meanings: in play, play a card, play with the top of your library revealed, and so on