The first will tap for and then put the top land on your library into your hand and the other cards into your graveyard and then trigger your background Commander
Helm of the Ghastlord is already a great card to slam onto any Dimir creature out there, but that overlooks the combo potential that this card also brings with it
But then the ability, unlike the other members in the cycle, does not give the Adversary +1/+1 tokens, but valor ones
Amusingly, your opponents will probably need a non-creature spell to take it out, so you might get one last draw on the Sentinel's way out
While this card is very efficient already, the ability to double up and create more tokens if you gain life and have the citys blessing as you work towards having it anyway is a major ability
We already have Teferis Protection, creatures that grant Indestructible, and ways to avoid non-combat damage, so Im happy to take another one