Sacrifice a creature, Return Recurring Nightmare to its owner's hand: Return target creature card from your graveyard to the battlefield. Activate this ability only any time you could cast a sorcery.

This spell can't be countered.
Protection from blue

Each player may put an artifact, creature, enchantment, or land card from their hand onto the battlefield.

You may exile a green card from your hand rather than pay this spell's mana cost.
Flash
Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)