Reki, the History of Kamigawa

Whenever you cast a legendary spell, draw a card.

Rending Vines

Destroy target artifact or enchantment if its mana value is less than or equal to the number of cards in your hand.
Draw a card.

Sakura-Tribe Scout

{T}: You may put a land card from your hand onto the battlefield.

Sasaya, Orochi Ascendant

Reveal your hand: If you have seven or more land cards in your hand, flip Sasaya.

Sasaya's Essence

Whenever a land you control is tapped for mana, add an additional one mana of any type that land produced for each other land you control with the same name as it.

Sasaya, Orochi Ascendant // Sasaya's Essence

Seed the Land

Snake

Whenever a land enters, its controller creates a 1/1 green Snake creature token.

Seek the Horizon

Search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.

Sekki, Seasons' Guide

Spirit

Sekki enters with eight +1/+1 counters on it.
If damage would be dealt to Sekki, prevent that damage, remove that many +1/+1 counters from Sekki, and create that many 1/1 colorless Spirit creature tokens.
Sacrifice eight Spirits: Return this card from your graveyard to the battlefield.

Shinen of Life's Roar

All creatures able to block this creature do so.
Channel — {2}{G}{G}, Discard this card: All creatures able to block target creature this turn do so.

Kitsune Bonesetter

{T}: Prevent the next 3 damage that would be dealt to target creature this turn. Activate only if you have more cards in hand than each opponent.

Stampeding Serow

Trample
At the beginning of your upkeep, return a green creature you control to its owner's hand.

Iname as One

When Iname as One enters, if you cast it from your hand, you may search your library for a Spirit permanent card, put it onto the battlefield, then shuffle.
When Iname as One dies, you may exile it. If you do, return target Spirit permanent card from your graveyard to the battlefield.

Ashes of the Fallen

As this artifact enters, choose a creature type.
Each creature card in your graveyard has the chosen creature type in addition to its other types.

Blood Clock

At the beginning of each player's upkeep, that player returns a permanent they control to its owner's hand unless they pay 2 life.

Ebony Owl Netsuke

At the beginning of each opponent's upkeep, if that player has seven or more cards in hand, this artifact deals 4 damage to that player.

Ivory Crane Netsuke

At the beginning of your upkeep, if you have seven or more cards in hand, you gain 4 life.

Manriki-Gusari

Equipped creature gets +1/+2 and has "{T}: Destroy target Equipment."
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Saviors of Kamigawa