One of blue's best ETB cards if you're focusing on typal strategies, this enchantment triggers when your creatures attack as well as when they enter, and you mitigate the risk of an expensive do-nothing enchantment since it replaces itself several times over the turn it comes into play
Duskmourn has given us more white cards that play specifically around 2 power
This set has 164 with 40 more on this bonus sheet, more than twice as many
Creatures with hexproof that player controls will be tapped as that ability resolves
When you have zombies in play, which is pretty often in these decks, the Crawler can own games being a single mana to bring back
Since The Archimandrite's activated ability doesn't have a tap symbol in its cost, you can tap creatures that haven't been under your control since your most recent turn began (including The Archimandrite itself) to pay the cost