The other thing to remember is that a card's colour identity is defined by the identity of both faces combined
Even many of the team-stamped commons and uncommons see demand from character and villain collectors who want to fill out their binders
Tyrunt #70 (Pokemon Promo | Pokemon Cards) prices are based on the historic sales
Dark Omastar's other attack, Dark Tentacle, can prevent the foe from evolving while it is the Active Pokemon while also doing some damage
On the other card face, you have [c]Sword of the Realms[/c], a low-cost equipment that gives your equipped creature +2/+0 and vigilance
You could make this deck work with the Poipole line, the Ekans line, the Alolan Grimer line (with the Promo A-Grimer card), or the Koffing line with a bit of tweaking, as long as youre running Nihilego and you can Poison your opponent