yugioh gravekeeper deck list Gravekeeper's Gravekeeper Cohesion (Extra missing) Deck

Although many different cards could have Ditto underneath them, the most valuable of them all is the Bidoof

Sword Sparks: In case of literal spark, seen in the artwork of Tryce

Gavin Verhey from Wizards of the Coast explains Heroes of the Realm 3.0 3.1 3.2 Comment by u/Wizards_Drew on r/magicTCG on Reddit Outside of a unlisted rule for the Commander format that the original recipient of a Heroes of the Realm card is allowed to use it

The wording allows you to either generate a second copy of the same creature from your deck, or grab a completely unrelated creature which happens to share the same total stats

This can be a great way of achieving a particular rare (along with a few random ones), assuming its a rare that you want