Its everything blue wants to do
However, it seems Cross hasnt given up on the Leader just yet, and managed to make top 16 in a 900+ tournament
If another ability of a source you control triggers when attackers are declared, such as that of Hamlet Captain, you may have it resolve before or after that of Hanweir Garrison or Hanweir, the Writhing Township
Every single turn, Atraxa can tick up your planeswalkers, accelerate your sagas, buff your creatures, accumulate poison, increase your energy, or any number of other powerful effects
After finding a Mewtwo in it, I decided to purchase the lot even though I was convinced they were bootlegs
"Shield" is not an ability that permanents have and shield counters are not keyword counters