Abzan Beastmaster: something something draw a card is always worth exploring.
Ainok Guide: boost it with Hardened Scales or make sure your next card is a land.
Fruit of the First Tree: ...draw X cards... enough said.
Battlefront Krishok: ...can't be blocked by more than one creature... is worth exloring.
Cached Defences: worth checking out if Bolster works out.
Harsh Sustenance: X damage to player is worth exploring.
Whisperer of the Wilds: every mana dork deserves a test run, even if at first sight this one may not seem great.
Sudden Reclamation: feeds for Delve and gives you a bonus.
Grim Contest: worth checking out with lots of deathtouch.