-Other All-Stars: Aura Shards, Adaptive Automaton, Metallic Mimic, Loyal Unicorn, and oddly enough Wishmonger
There are some good cards already in the deck that you should add more of
Anthems are most effective when you control a ton of creatures, and a Saproling deck should do just that
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Legendary Creature - Advisor Zombie Mutant Jason Bright, Glowing Prophet Whenever a Zombie or Mutant you control dies, if its power was different from its base power, draw a card
Punishing your opponents for this with five damage to the face, especially when they cant regain it, can be tricky for them to work around