The first is the easiest: If you have a Yawgmoth, two undying creatures, and a Blood Artist, you can have your opponent lose as much life as you have cards in your deck
In the first run of The First Chapter, there were surprisingly few text errors that made it through to print
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Anyway, in Commander, he "haunts" another creature, only to reappear when that creature leaves the battlefield
A well-preserved version of this card graded (e.g., in PSA 10 Gem Mint conditio) by a professional grading company can fetch tens of thousands, or even hundreds of thousands of dollars
In other words, your pokemon's status effects can activate outside of your turn