If you really want to commit to the Sirens Call and Angels Trumpet idea, you can springboard off the Mandate of Peace idea and just play Peacekeeper and other cards that prevent creatures from attacking
(It's an artifact with " , , Sacrifice this token: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.") : Draw two cards and create a 2/2 colorless Robot artifact creature token
What thematic ties exactly
What to Expect Bundle Boxes: 9 play boosters, 15 Regular Land cards and 15 Foil Lands, 1 Bundle Promo card, 1 Reference card, 1 oversized die, and 1 set up box
Ill amend what I said a sentence ago and say this: if you arent going all in and making enemies with discard, it will be hard to flip the land side
Knowbys Incantation