mtg.wtf

[+1]: Create a tapped Powerstone token.
[–1]: Pay any amount of mana. Look at that many cards from the top of your library, then put one of those cards into your hand and the rest on the bottom of your library in a random order.
[–7]: You get an emblem with "Tap an untapped artifact you control: This emblem deals 1 damage to any target."

[+1]: Create a tapped Powerstone token.
[0]: Pay any amount of mana. Look at that many cards from the top of your library, then put one of those cards into your hand and the rest on the bottom of your library in a random order.
[–6]: You get an emblem with "Tap an untapped artifact you control: This emblem deals 1 damage to any target."

[+1]: Reveal the top two cards of your library. An opponent chooses one of them. Put that card into your hand and exile the other with a silver counter on it.
[–1]: Put a card you own with a silver counter on it from exile into your hand.
[–2]: Create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."

Activated abilities of artifacts your opponents control can't be activated.
[+1]: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value.
[–2]: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.

{W}, {T}: Look at the top card of your library, then exile it face down.
{T}: Until end of turn, you may play cards you own exiled with Kayla's Music Box.

You may look at face-down creatures you don't control any time.

Blue creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, target creature an opponent controls doesn't untap during its controller's next untap step.

{T}: Add {G}, {U}, or {R}.
Cycling {2}

Key to the Archive enters tapped.
When Key to the Archive enters, draft a card from Key to the Archive's spellbook, then discard a card.
{T}: Add two mana in any combination of colors.

{T}, Discard a card: Up to one target creature can't be blocked this turn.
Whenever Key to the City becomes untapped, you may pay {2}. If you do, draw a card.

{1}, {T}, Sacrifice Keys to the House: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
{3}, {T}, Sacrifice Keys to the House: Lock or unlock a door of target Room you control. Activate only as a sorcery.

When Khalni Gem enters, return two lands you control to their owner's hand.
{T}: Add two mana of any one color.

{2}, {T}: Tap all other artifacts. They don't untap during their controllers' untap steps for as long as Kill Switch remains tapped.

Whenever Kiln Walker attacks, it gets +3/+0 until end of turn.

Equipped creature gets +0/+3.
Equip {3}

Equipped creature gets +1/+0 and has flying.
Equip {2}

{2}, {T}: Exile the top card of your library face down.
{0}: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand.
When Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.

{T}: Add {B} or {R}.
{4}{B}{R}: Kolaghan Monument becomes a 4/4 black and red Dragon artifact creature with flying until end of turn.

Konda's Banner can be attached only to a legendary creature.
Creatures that share a color with equipped creature get +1/+1.
Creatures that share a creature type with equipped creature get +1/+1.
Equip {2}

All Swamps are 1/1 black creatures that are still lands.

Whenever a player casts a blue spell, you may gain 1 life.

If you would roll a die, instead roll two of those dice and ignore one of those results.

If you would flip a coin, instead flip two coins and ignore one.

Sacrifice an artifact: Add {C}{C}.