Resources

Magic: The Gathering Comprehensive Rules Changes

Shards of Alara to Conflux (Single Change View)

General changes

Old rule (Shards of Alara) New rule (Conflux)

306.4d.

A permanent that's both a blocking creature and a planeswalker that's being attacked is partially removed from combat if it stops being either a creature or a planeswalker (but not both). It's not removed from the portion of combat that's relevant to the card type it still is.