Prognostic Sphinx

This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) T: Add G or U.

Create two 3/3 green Centaur enchantment creature tokens. If it's your turn, scry 2.

Untap all creatures and lands you control during each other player's untap step. You may cast creature spells as though they had flash.

XXG: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.) When this creature becomes monstrous, create X X/X green Hydra creature tokens.

1G, Sacrifice this enchantment: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.