There are so many ways to make creatures unblockable when playing Dimir, so this effect is easily repeatable
The first card to "mill" was an artifact from Antiquities : The card was named Millstone
Following that logic, the idea of removing Wyleth before it can attack is something everyone at the table will think of, so you need to include multiple cards to prevent that
You can also play variations of that format, depending on what you and your friends are into
For this, I mostly use the TCG Market price (minus 15% for fees and shipping), which is basically the completed listings of the TCG Marketplace and shows the actual prices that cards have sold for and not just what people are asking for their cards
If one creature uses an energy to get +1/+1 until end of turn, how many +1/+1s is draw a card on a different energy creature worth