New Frontiers

Each player may search their library for up to X basic land cards and put them onto the battlefield tapped. Then each player who searched their library this way shuffles.

Nimble Mongoose

Shroud (This creature can't be the target of spells or abilities.)
Threshold — This creature gets +2/+2 as long as there are seven or more cards in your graveyard.

Nut Collector

Squirrel

At the beginning of your upkeep, you may create a 1/1 green Squirrel creature token.
Threshold — All Squirrels get +2/+2 as long as there are seven or more cards in your graveyard.

Karmic Justice

Whenever a spell or ability an opponent controls destroys a noncreature permanent you control, you may destroy target permanent that opponent controls.

Overrun

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

Piper's Melody

Shuffle any number of target creature cards from your graveyard into your library.

Primal Frenzy

Enchant creature
Enchanted creature has trample.

Rabid Elephant

Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it.

Refresh

Rites of Spring

Discard any number of cards. Search your library for up to that many basic land cards, reveal them, put them into your hand, then shuffle.

Wurm

Roar of the Wurm

Create a 6/6 green Wurm creature token.
Flashback {3}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Seton, Krosan Protector

Tap an untapped Druid you control: Add {G}.

Seton's Desire

Enchant creature
Enchanted creature gets +2/+2.
Threshold — As long as there are seven or more cards in your graveyard, all creatures able to block enchanted creature do so.

Simplify

Each player sacrifices an enchantment of their choice.

Kirtar's Desire

Enchant creature
Enchanted creature can't attack.
Threshold — Enchanted creature can't block as long as there are seven or more cards in your graveyard.

Skyshooter

Reach (This creature can block creatures with flying.)
{T}, Sacrifice this creature: Destroy target attacking or blocking creature with flying.

Odyssey