Adamaris, Noble Lurker

+1: Search target players library and summon a card of your choice under your control, if that card is blue gain 5 life
+5: Turn target land into a island then spawn x 2/2 mermaid tokens with island walk where x is number of islands on the battlefield
-12: If there are five or more islands on the battle field you gain 30 life and summon 3 10/20 mermaid knight tokens with island walk