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A full pack is fine too

Origin allows the archetype to summon using monsters in the graveyard and can be banished after use to protect a boss monster

Special Summon WATER Link Monsters from your GY whose combined Link Ratings equal exactly 3

The Pokmon Company doesnt mention microtransactions specifically in todays announcement, so well have to wait to see exactly how the in-game economy shakes out, but for now it does sound like you can earn new cards and avatar accessories without spending money

However, you have to put it directly into play, and if even one card is missing, you lose

Specific card choices: Ghostrick-wise