Ominous Sphinx

Flying
Whenever you cycle or discard a card, target creature an opponent controls gets -2/-0 until end of turn.

Rampaging Brontodon

Trample
Whenever Rampaging Brontodon attacks, it gets +1/+1 until end of turn for each land you control.

Engineered Explosives

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.)
, Sacrifice Engineered Explosives: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Engineered Explosives.

Glimmervoid

At the beginning of the end step, if you control no artifacts, sacrifice Glimmervoid.
: Add one mana of any color.

Terastodon

When Terastodon enters the battlefield, you may destroy up to three target noncreature permanents. For each permanent put into a graveyard this way, its controller creates a 3/3 green Elephant creature token.

Surge Node

Surge Node enters the battlefield with six charge counters on it.
, , Remove a charge counter from Surge Node: Put a charge counter on target artifact.

Trash for Treasure

As an additional cost to cast this spell, sacrifice an artifact.
Return target artifact card from your graveyard to the battlefield.

Rampaging Brontodon

Trample
Whenever Rampaging Brontodon attacks, it gets +1/+1 until end of turn for each land you control.

Tormod’s Crypt

, Sacrifice Tormod’s Crypt: Exile all cards from target player’s graveyard.

Excavation Mole

Trample
When Excavation Mole enters the battlefield, mill three cards.

Honey Mammoth

When Honey Mammoth enters the battlefield, you gain 4 life.

Corpse Churn

Mill three cards, then you may return a creature card from your graveyard to your hand. (To mill a card, put the top card of your library into your graveyard.)

Daybreak Chimera

This spell costs less to cast, where X is your devotion to white. (Each in the mana costs of permanents you control counts toward your devotion to white.)
Flying

Salvager of Secrets

When Salvager of Secrets enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Thunderherd Migration

As an additional cost to cast this spell, reveal a Dinosaur card from your hand or pay .
Search your library for a basic land card, put it onto the battlefield tapped, then shuffle your library.

Dragon

Flying
: This creature gets +1/+0 until end of turn.

Read the Bones

Scry 2, then draw two cards. You lose 2 life. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)