Tocasia's Welcome

Whenever one or more creatures with mana value 3 or less enter the battlefield under your control, draw a card. This ability triggers only once each turn.

Transmogrant Altar

{B}, {T}, Sacrifice a creature: Add {C}{C}{C}.
{2}, {T}, Sacrifice a creature: Create a 3/3 colorless Zombie artifact creature token. Activate only as a sorcery.

Recommission

Return target artifact or creature card with mana value 3 or less from your graveyard to the battlefield. If a creature enters the battlefield this way, it enters with an additional +1/+1 counter on it.

Forest

Perimeter Patrol

Whenever an artifact enters the battlefield under your control, Perimeter Patrol gets +1/+0 until end of turn.

Swamp

Scrapwork Rager

When Scrapwork Rager enters the battlefield, you draw a card and you lose 1 life.
Unearth {3}{B} ({3}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Shoot Down

Exile target artifact, enchantment, or creature with flying.

Yotian Dissident

Whenever an artifact enters the battlefield under your control, put a +1/+1 counter on target creature you control.

Loran of the Third Path

Vigilance
When Loran of the Third Path enters the battlefield, destroy up to one target artifact or enchantment.
{T}: You and target opponent each draw a card.

Legions to Ashes

Exile target nonland permanent an opponent controls and all tokens that player controls with the same name as that permanent.

Sigil of Valor

Whenever equipped creature attacks alone, it gets +1/+1 until end of turn for each other creature you control.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Ravenous Gigamole

When Ravenous Gigamole enters the battlefield, mill three cards. You may put a creature card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on Ravenous Gigamole. (To mill a card, put the top card of your library into your graveyard.)

Argivian Avenger

{1}: Until end of turn, Argivian Avenger gets -1/-1 and gains your choice of flying, vigilance, deathtouch, or haste.

Plains

Gaea's Gift

Put a +1/+1 counter on target creature you control. It gains reach, trample, hexproof, and indestructible until end of turn. (It can't be the target of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy it.)

Loran's Escape

Target artifact or creature gains hexproof and indestructible until end of turn. Scry 1.

Prison Sentence

Enchant creature
When Prison Sentence enters the battlefield, scry 2.
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Gixian Skullflayer

At the beginning of your upkeep, if there are three or more creature cards in your graveyard, put a +1/+1 counter on Gixian Skullflayer.

Overwhelming Remorse

This spell costs {1} less to cast for each creature card in your graveyard.
Exile target creature or planeswalker.

Gaea's Courser

Whenever Gaea's Courser attacks, if there are three or more creature cards in your graveyard, draw a card.

Siege Veteran

At the beginning of combat on your turn, put a +1/+1 counter on target creature you control.
Whenever another nontoken Soldier you control dies, create a 1/1 colorless Soldier artifact creature token.

Clay Revenant

Clay Revenant enters the battlefield tapped.
{2}{B}: Return Clay Revenant from your graveyard to your hand.

Obstinate Baloth

When Obstinate Baloth enters the battlefield, you gain 4 life.
If a spell or ability an opponent controls causes you to discard Obstinate Baloth, put it onto the battlefield instead of putting it into your graveyard.

Hero of the Dunes

When Hero of the Dunes enters the battlefield, return target artifact or creature card with mana value 3 or less from your graveyard to the battlefield.
Creatures you control with mana value 3 or less get +1/+0.