First off, we all know that sometimes Magic mechanics are pushed for Constructed formats, and sometimes they are just for Limited play with maybe a few rare or mythic exceptions
In decks with many creatures you may want to run at least 1 board protection card with more ( 2-3 ) to be recommended unless you can have other ways to recover your board like mass recursion
With Valgavoth around, you can play the cards it redirects to exile from your opponents graveyard using your life as mana, then proceed to gain some 9 life when you attack
You must cast it during the resolution of that trigger
Geths Grimoire Geth's Grimoire turns your opponents discards into card draw for you, though as a may ability so that you dont deck yourself or force yourself to discard when you dont want to
It lets everyone play more cards, and draw more cards