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Depending on how many tokens you tap, you get a different effect

So discover is a powerful mechanic that can see prints outside of Lost Caverns and is more likely to return than cascade

and the extra effects can let you get rid of singular cards in your hand "Phantom Hand" style (which may have been good for Kalin in case he ever drew his earthbound immortal early), can control his top deck a bit (better chance of pulling of the archfiend), or just wipe out both player's hand entirely (fulfilling handless for you and doing burn damage to the opponent

Simic was first about a +1/+1 counter matters, so you can add those blue effects