Oracle of Dust

Devoid (This card has no color.)
{2}, Put a card an opponent owns from exile into that player's graveyard: Draw a card, then discard a card.

Volo, Guide to Monsters

Whenever you cast a creature spell that doesn't share a creature type with a creature you control or a creature card in your graveyard, copy that spell. (A copy of a creature spell becomes a token.)

Moldgraf Scavenger

Delirium — This creature gets +3/+0 as long as there are four or more card types among cards in your graveyard.

Ancient Brontodon

Quilled Wolf

{5}{G}: This creature gets +4/+4 until end of turn.

Somberwald Stag

When this creature enters, you may have it fight target creature you don't control.

War Mammoth

Tishana's Wayfinder

When this creature enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Brushstrider

Vigilance (Attacking doesn't cause this creature to tap.)

Noose Constrictor

Reach
Discard a card: This creature gets +1/+1 until end of turn.

Undercity Troll

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
{2}{G}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)