(If you don't play with teammates, or if you don't play with silver-bordered cards, you might replace it with Culling the Weak.) For reference, the math on Army of the Damned is that about 1/3 of your cards are lands = 8/24, meaning you need to survive to turn 17-18 (have seen a total of 24 cards between your opening hand and your draws each turn) to hit that 8th land
First up, Flare of Fortitude offers blanket protection for your board, preventing your life total from changing for the turn while granting Creatures Hexproof and Indestructible
Resubmissions and Duplicates Some cards are cracked out of their graded cases and resubmitted to grading companies in the hopes of achieving a higher grade
Reclamation Sage Since every player in Commander runs mana rocks (except that one commenter um, actuallying me, I see you), Reclamation Sage always has a few targets
Ripple triggers are put on top of the original spell on the stack