shaymin sky form pokemon card [Colorless]. pokemon:shaymin-sky - Card Search –

I like to trigger infinite gravestorm triggers and exile entire libraries with Bitter Ordeal

Mystical Tutor Number three on the list is Mystical Tudor

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with Flying

The Spirit tokens Teysa creates have flying, making them not just evasive but powerful with the static stat boost Teysa provides

time capsule, find someone who bought product from day one and kept everything sealed etc

Even with that downside (of no attacks when they have no benched Pokmon), I think Gengar is still pretty strong even if it struggles some against Psychic resistance