While commons might not come to mind when you think of valuable cards, quite a few are worth a pretty penny, particularly those from older sets
If you do, when this creature enters, create a 1/1 token copy of it.) This creature can't be blocked by creatures with power 2 or less
Heres how it plays out: You are required to have The Gitrog Monster out, Dakmor Salvage in hand and more than 7 cards in hand total At the end of the turn, discard down to hand size, discarding Dakmor Salvage This gives you a draw card trigger from The Gitrog Monster Priority passes to opponents On resolution of the draw trigger, replace this with the dredge from Dakmor Salvage, milling 2 cards and returning Dakmor Salvage to hand As it is still the cleanup step you still need to discard down to 7 cards in hand, again discarding Dakmor Salvage and repeating the combo above on a loop The idea is you loop this to fill your graveyard and try to win from there
its all pretty scary if youre durdling along and have missed a land drop
10 Bane Of The Living A Sweeper In Disguise It's easy to misjudge what your opponent's morph creatures could be, but an actual board wipe is one of the worst effects you could blindly run into