Rule 144.4.a.1
Units cannot Move to a Battlefield that already has units from 2 other players present, or where a Combat is ongoing that has 2 other players as participants. See rule 447.2. For more information on valid destinations for movement.
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Units cannot Move to a Battlefield that already has units from 2 other players present, or where a Combat is ongoing that has 2 other players as participants. See rule 447.2. For more information on valid destinations for movement.