The Darkness-types in Genetic Apex are instead Generation I Poison-types like Zubat and Koffing, which were categorized as Darkness in the TCG at the time of the game's release (as opposed to their previous classification under Grass or Psychic)
(More on this in a little bit.) This means you'll want to be two-color far more often than normal, and you may even want to skew the lands you choose to favor the color that has more adamant cards
It's easy to misunderstand because there are precedents for Gladiator Beast and Kimefo, but it's possible to fusion summon using Polymerizationnormally, otherwise the effect won't activate
YuGiOh Wing Raiders Rare Gagaga Cowboy WIRA-EN043 Series: Wing Raiders Brand: YuGiOh Company: Konami Item Type: Single Card Release Date: February 12, 2016 UPC: 643690195559 Stock #: 233489 Our Guarantees to You, Our Valued Customer
It varies based on the supplier's model, product cost, and inventory