Combine Guildmage

• WWizards of the Coast2019-01-25
  Official Ruling
  If either target creature is an illegal target by the time Combine Guildmage’s second ability tries to resolve, nothing happens. No creature loses or gets a +1/+1 counter.
• WWizards of the Coast2019-01-25
  Official Ruling
  If a creature would normally enter the battlefield with no +1/+1 counters on it, Combine Guildmage’s first ability causes it to enter the battlefield with a +1/+1 counter on it.
• WWizards of the Coast2019-01-25
  Official Ruling
  If the first target creature for Combine Guildmage’s second ability has no +1/+1 counters on it as the ability resolves, nothing happens. The second target creature doesn’t get a +1/+1 counter.

Rulings via Scryfall