440.2. In Modes of Play with more than two players, Battlefields with Staged Combats or Combats in Progress are Invalid to be chosen as a location to play one or more Units by a player not involved in that Combat by any means,
440.2.a. If an effect would require a Unit be played to a Battlefield with a Staged Combat or a Combat in Progress , where the controller of the played unit is not a participant, instead the Unit is played to its controller's Base.
440.2.b. Any subsequent reference to "here" in the corresponding effect is reassigned to the Controller's Base , where the Unit was played. Any further effects that may be invalidated are invalidated as if the effect was mistargeted. See_rule_REF_352.5_DOT Targeting for more information on Mistargeting.