When Forerunner of the Heralds enters, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top. Whenever another Merfolk you control enters, put a +1/+1 counter on Forerunner of the Heralds.
Ascend At the beginning of each upkeep, create a 1/1 green Saproling creature token. Saprolings you control get +2/+2 as long as you have the city's blessing.
As an additional cost to cast this spell, reveal a Dinosaur card from your hand or pay {1}. Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.