Seven times? Christ, man, that's bad luck. I can see failing on the first time out because it's not at all a sure thing, but they've tuned it so that your power levels are pretty close.
I like adventure raids much more than the regular kind, but if you have bad luck getting matchmade with literal children who take 30 seconds to decide twice in a row to use Poison Fang against a steel-type legendary I can see how that'd turn you off. (We still won.)
If you want to heal during battle, pick a pokemon who knows a healing move. If you want to heal between battles, swap in a fresh catch, trade with a scientist, or pass through a berry pile. If you're raiding solo, you control the path through the dungeon unilaterally.
Also, the conditions for triggering an encounter with Spiritomb are kind of obscure, so this may help:
I like adventure raids much more than the regular kind, but if you have bad luck getting matchmade with literal children who take 30 seconds to decide twice in a row to use Poison Fang against a steel-type legendary I can see how that'd turn you off. (We still won.)
If you want to heal during battle, pick a pokemon who knows a healing move. If you want to heal between battles, swap in a fresh catch, trade with a scientist, or pass through a berry pile. If you're raiding solo, you control the path through the dungeon unilaterally.
It's a situation kind of like Deoxys in Omega Ruby and Alpha Sapphire, in that although they were previously event-exclusive, you can now get some of them in-game. Data miners found that an encounter for Victini exists, but it's still undiscovered how to trigger it. For Keldeo in particular, here's how you get one:Whoa whoa whoa, hold the phone, there are catchable Mythicals now? As in, they’re just there, in the game? Oh man I hope this means we see some in VGC.
Bring a Cobalion, Terrakion, and Virizion that were caught in Galar (possibly even the specific ones you caught in your own save file) to the little island next to the large island with the big tree. On that island, there's a pot. Set up a campsite there and make curry, and Keldeo will appear.
Also, the conditions for triggering an encounter with Spiritomb are kind of obscure, so this may help:
Near the lake is a tombstone with the words "Spread my voice" on it. What this means is to talk to a lot of other players in the Crown Tundra area. I think the threshold is like 40, but the message you get for checking the tombstone will change every 10.