You can only activate 1 "Sacred Serpent's Wake" per turn. If you control 2 or more different kinds of monsters (Ritual, Fusion, Synchro or Xyz): Activate 1 or more effects, depending on the number of different kinds you control, and resolve in sequence;

?2 or more: Target 1 monster in your Graveyard or 1 of your banished monsters; add that target to your hand.

?3 or more: Target 1 Trap Card in your Graveyard; add that target to your hand.

?4: Target 1 Spell Card in your Graveyard, except "Sacred Serpent's Wake"; add that target to your hand.