Start with at least 10 counterspells as the number of counterspells you should play in Commander, and it really depends on the deck youre building
Ugin, The Spirit Dragon The most costly MTG planeswalker on this list, Ugin, The Spirit Dragon comes with plenty of loyalty and some extremely powerful effects that make them well worth the cost
Hibernation Sliver makes all Slivers very difficult to kill as long as you have life points and mana left to play with, and with all your creatures so cheap you would usually have plenty of both when it counted
Theres a real argument to be had over which card is more powerful between Brutal Cathar and Skyclave Apparition, and while I imagine Skyclave Apparition wins out in most scenarios, it is worth noting that Brutal Cathar can nab multiple creatures if you are able to transform it multiple times
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