The default deck type for Pokmon is a sort of aggressive tempo-based strategy
You don't want to cut that Aetherling, you don't want to have no life gain but you also don't want to play two six drop threats and play the Wurmcoil as well as the Aetherling
Otherwise, you effectively discard the card

(Don't apply Weakness and Resistance for Benched Pokemon.) Manufacturer: The Pokemon Company Related Products Rayquaza ex - 102/107 - Rare Holo EX POK: EX Deoxys Heavily Played 1 In Stock Heavily Played 1 In Stock Heavily Played 1 In Stock Shedinja - 14/107 - Holo Rare POK: EX Deoxys Damaged 1 In Stock Damaged 1 In Stock Damaged 1 In Stock Magikarp - 64/107 - Common POK: EX Deoxys Heavily Played 1 In Stock Heavily Played 1 In Stock Heavily Played 1 In Stock Breloom - 3/107 - Holo Rare POK: EX Deoxys Moderately Played 1 In Stock Moderately Played 1 In Stock Moderately Played 1 In Stock Deoxys (Normal) - 16/107 - Holo Rare POK: EX Deoxys Moderately Played 3 In Stock Moderately Played 3 In Stock Moderately Played 3 In Stock Damaged 1 In Stock Koffing - 62/107 - Common - Reverse Holo POK: EX Deoxys Heavily Played 1 In Stock Heavily Played 1 In Stock Heavily Played 1 In Stock Master Ball - 88/107 - Uncommon POK: EX Deoxys Moderately Played 2 In Stock Moderately Played 2 In Stock Moderately Played 2 In Stock Scramble Energy - 95/107 - Uncommon POK: EX Deoxys Lightly Played 1 In Stock Lightly Played 1 In Stock Lightly Played 1 In Stock

Wakanda Forever: Power Up With Artifacts, Reign as the Monarch TChalla is clearly telling you to play artifacts and keep playing them, and lets go over a few things that look possible: Peregrin Took wants to add some food to your Vibranium
Im sure that there are other more broken ways to use Selvala, but this partner pair definitely seems like the most fun out of the available options