mtg.wtf

{T}: Add {U}.

Secluded Steppe enters the battlefield tapped.
{T}: Add {W}.
Cycling {W}

For each token you control, create a token that's a copy of that permanent.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.

Secret Passage enters the battlefield tapped.
{T}: Add {U} or {B}.
{4}, {T}: Investigate.

Sedge Troll gets +1/+1 as long as you control a Swamp.
{B}: Regenerate Sedge Troll.

Each creature card in your graveyard has unearth {2}{B}.

Untap all permanents you control during each other player's untap step.

Enchant creature
Enchanted creature can't be blocked except by artifact creatures and/or white creatures.

{T}: Untap target creature.

Prowess
Whenever you cast a noncreature spell, Seeker of the Way gains lifelink until end of turn.

Add {R}{R}{R}{R}{R}.

Whenever Segmented Wurm becomes the target of a spell or ability, put a -1/-1 counter on it.

Islandwalk

Discard a land card: Seismic Assault deals 2 damage to any target.

Untap target creature. After this main phase, there is an additional combat phase followed by an additional main phase.
Flashback {2}{R}

Selesnya Sanctuary enters the battlefield tapped.
When Selesnya Sanctuary enters the battlefield, return a land you control to its owner's hand.
{T}: Add {G}{W}.

Search your library for a basic land card and reveal it. If there's a tree in its art, put it onto the battlefield tapped. Otherwise, put it into your hand. Then shuffle.

Flying
Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.

Whenever another creature enters the battlefield, its controller may draw a card if its power is greater than each other creature's power.
{G}, {T}: Add X mana in any combination of colors, where X is the greatest power among creatures you control.

At the beginning of your upkeep, choose target opponent. This turn, that player can't cast spells or activate abilities and plays with their hand revealed. You may play lands and cast spells from that player's hand this turn.

Artifacts you control are Clues in addition to their other types and have "{2}, Sacrifice this artifact: Draw a card."
Whenever you sacrifice a Clue, target creature can't be blocked this turn.

When Sengir Autocrat enters the battlefield, create three 0/1 black Serf creature tokens.
When Sengir Autocrat leaves the battlefield, exile all Serf tokens.

Flying
Whenever a creature dealt damage by Sengir Vampire this turn dies, put a +1/+1 counter on Sengir Vampire.

{1}: Look at the top three cards of your library, then put them back in any order.
{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.