As ever, all prices are correct at the time of writing, but these things change pretty rapidly
If you are looking for a way to try out Exosister without commiting too many gems at once, we'd recommend buildung as much of the second decklist's affordable parts as possible
Sandshrew I might be in the minority on this one, but I have high hopes for this little Sandshrew [Pokemon 151]
5 Shining Rayquaza (Shining Legends) As Dragon-type cards very often require multiple types of energy to be effective, Shining Rayquaza can fit into many of them easily, though should only be played when a trainer needs to deal huge damage, regardless of the consequences
The potential to activate it multiple times a turn lets you get really far ahead, and it does all the planeswalker things provides board presence, card advantage, and removal in a single card