Thats exactly why its important to understand the subtle factors that can influence your mulligan decisions
Emerald Tortoise would be better if the deck had a flip monster it could take advantage of, or if it could change monsters on the opponents side of the field into defense position during their turn
Card Name Mana Cost Type Legendary Planeswalker Oko Rarity Mythic Rare rules Text +1: Put two +1/+1 counters on up to one target creature you control.0: Until end of turn, Oko becomes a copy of target creature you control
Besides that, the deck is heavily reliant on spells, and most explain themselves
Farfa, Malebranche of the Burning Abyss X DARK Level 3 [ Fiend / Effect ] ATK 1000 DEF 1900 If you control a monster that is not a "Burning Abyss" monster, destroy this card
GR Gold Rare Scrap Wyvern X EARTH Link 2 [ DragonLinkEffect ] ATK 1700 DEF - 2 monsters, including a "Scrap" monster You can target 1 "Scrap" monster in your GY