Ziatora, The Incinerator can make ramp itself, as when you sacrifice a creature with its effect you get three Treasure tokens
Kogla is in my opinion one of the strongest standalone Green cards printed in the last year, killing a creature and then going to town on artifacts/enchantments, but it's even better in this deck since all Werewolves are also Humans on the front side, so you can use Kogla to save them from removal or give itself indestructible
Stasis Snare currently starts at $ 0.10
Gholdengo EX And Energy Search Pro Never Too Much Energy All Ace Spec cards provide some of the most powerful effects in the TCG at the cost of only allowing one of the card types in the deck, and some of them synergize really well with specific cards
Generally, it's safest to use matte sleeves, or even better yet, dual matte, for tournaments or other organized play