Mystic Decree

All creatures lose flying and islandwalk.

Forest

Island

Island Sanctuary

If you would draw a card during your draw step, instead you may skip that draw. If you do, until your next turn, you can't be attacked except by creatures with flying and/or islandwalk.

Plains

Rule of Law

Each player can't cast more than one spell each turn.

Eidolon of Rhetoric

Platinum Angel

Flying
You can't lose the game and your opponents can't win the game.

Phelddagrif

{G}: Phelddagrif gains trample until end of turn. Target opponent creates a 1/1 green Hippo creature token.
{W}: Phelddagrif gains flying until end of turn. Target opponent gains 2 life.
{U}: Return Phelddagrif to its owner's hand. Target opponent may draw a card.