Duskmourn (DSK): The main set, featuring a huge assortment of cards, kindred (typal) choices, and some cards you defiantly will recognize
Thats why its a banned card - because one mana for three cards is an overwhelmingly good value proposition
Its not a huge surprise to see both Urza and Mishra in card form here, and its also not a huge surprise to see them as some of the more powerful cards in the set
enters-the-battlefield effects are a little less powerful and a bit less common in general, so reanimation isnt as game-changing
For each of them, you choose whether you want to put a time counter on that card or permanent, remove a time counter from it, or do neither
Skulk is a evasion ability that appears on creatures, and any creature with it cant be blocked by creatures with greater power than the skulk creature