These cards don't provide a mechanical reason to play them - most of them have bad stats, negative effects, some are just vanilla creatures, others are entirely unusable without significant workarounds
For local events, make sure to talk to your Judge or Organizer about what cards are able to be played at each event
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These lands were groundbreaking when Unhinged and Unglued came out, but we've had two editions of Zendikar since then along with random full-art promos from other sets
However, The Phasing of Zhalfir isnt perfect, as it still gives your opponents an army of Phyrexians to work with
It would probably be one of my favorite mons, honestly