pokemon cards chesnaught EX XY18 - Holofoil XY Promos any damage done to this Pokemon by attacks is reduced by 20 (after applying Weakness and Resistance). Chesnaught - XY68 (Prerelease [Staff]

It doesnt do much else than that, but what else does it need to do

Theres also the tiny problem that the card is banned in multiple formats

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Discard Pile : Cards taken out of play go to the discard pile

This card strongly supports the generation of artifact tokens with two types of abilities