Historical Rules · 6 June 2025
Rule 506.3c
Official source text from the 6 June 2025 Rules release
If an effect would put a creature onto the battlefield attacking either a player not in the game or a permanent that’s no longer on the battlefield or isn’t either a planeswalker or a battle, that creature does enter the battlefield, but it’s never considered to be an attacking creature. See rule 508.4a.