Thicket Basilisk

Whenever Thicket Basilisk blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

Drop of Honey

At the beginning of your upkeep, destroy the creature with the least power. It can't be regenerated. If two or more creatures are tied for least power, you choose one of them.
When there are no creatures on the battlefield, sacrifice Drop of Honey.

Force of Nature

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of your upkeep, Force of Nature deals 8 damage to you unless you pay {G}{G}{G}{G}.

Forest

Craw Wurm

Moss Monster

Fyndhorn Elves

Elkin Bottle

{3}, {T}: Exile the top card of your library. Until the beginning of your next upkeep, you may play that card.

Mightstone

Giant Spider

Reach (This creature can block creatures with flying.)

Marble Priest

All Walls able to block Marble Priest do so.
Prevent all combat damage that would be dealt to Marble Priest by Walls.

Tranquility

Johtull Wurm

Whenever Johtull Wurm becomes blocked, it gets -2/-1 until end of turn for each creature blocking it beyond the first.

Llanowar Elves

Conch Horn

{1}, {T}, Sacrifice Conch Horn: Draw two cards, then put a card from your hand on top of your library.

Su-Chi

Regrowth

Return target card from your graveyard to your hand.

Craw Giant

Trample
Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)

Feldon's Cane

{T}, Exile this artifact: Shuffle your graveyard into your library.

Birds of Paradise

Staff of the Ages

Creatures with landwalk abilities can be blocked as though they didn't have those abilities.

Elvish Hunter

{1}{G}, {T}: Target creature doesn't untap during its controller's next untap step.

Scaled Wurm

Wiitigo

Wiitigo enters with six +1/+1 counters on it.
At the beginning of your upkeep, put a +1/+1 counter on Wiitigo if it has blocked or been blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.