Grisly Salvage

Reveal the top five cards of your library. You may put a creature or land card from among them into your hand. Put the rest into your graveyard.

Scythe Tiger

Shroud (This creature can't be the target of spells or abilities.)
When this creature enters, sacrifice it unless you sacrifice a land.

Harvest Wurm

When this creature enters, sacrifice it unless you return a basic land card from your graveyard to your hand.

Drown in Filth

Choose target creature. Mill four cards, then that creature gets -1/-1 until end of turn for each land card in your graveyard.

Experiment One

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Remove two +1/+1 counters from this creature: Regenerate it. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Cast Down

Garruk's Companion

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

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.

Terramorphic Expanse

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.