mtg.wtf

{T}: Add {C}.
{T}: Choose target commander that entered the battlefield this turn. Put a +1/+1 counter on it if it's a creature and a loyalty counter on it if it's a planeswalker.

{T}: Add {C}.
Other Caves you control have "{T}, Pay 1 life: Add one mana of any color."

Forgotten Sentinel enters the battlefield tapped.

Forsaken City doesn't untap during your untap step.
At the beginning of your upkeep, you may exile a card from your hand. If you do, untap Forsaken City.
{T}: Add one mana of any color.

Forsaken Crossroads enters the battlefield tapped.
As Forsaken Crossroads enters the battlefield, choose a color.
When Forsaken Crossroads enters the battlefield, scry 1. If you weren't the starting player, you may untap Forsaken Crossroads instead.
{T}: Add one mana of the chosen color.

Colorless creatures you control get +2/+2.
Whenever you tap a permanent for {C}, add an additional {C}.
Whenever you cast a colorless spell, you gain 2 life.

At the beginning of your precombat main phase, add one mana of any color.

Visit — Scry 1.

Improvise

Artifact spells you cast cost {1} less to cast.

{T}: Add {C}.
{5}, {T}, Sacrifice Foundry of the Consuls: Create two 1/1 colorless Thopter artifact creature tokens with flying.

{T}: Add one mana of any color.
{3}: Fountain of Ichor becomes a 3/3 Dinosaur artifact creature until end of turn.

At the beginning of your upkeep, you gain 1 life.
{3}, Sacrifice Fountain of Renewal: Draw a card.

{2}, {T}: You gain 1 life.

{T}: Add {C}.
{T}: Roll the planar die. Activate only as a sorcery.

When Fraying Line enters the battlefield, put a rope counter on target creature you control.
At the beginning of each player's upkeep, that player may pay {2}. If they do, they put a rope counter on a creature they control. Otherwise, exile Fraying Line and each creature without a rope counter on it, then remove all rope counters from all creatures.

Each permanent you control has phasing.
At the beginning of your end step, flip a coin. If you win the flip, take an extra turn after this one.

Affinity for artifacts

{T}: Add {C}.
{1}{S}: Until end of turn, Frostwalk Bastion becomes a 2/3 Construct artifact creature. It's still a land.
Whenever Frostwalk Bastion deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.

Vigilance
Crew 1

When you planeswalk to Furnace Layer or at the beginning of your upkeep, select target player at random. That player discards a card. If that player discards a land card this way, they lose 3 life.
Whenever chaos ensues, you may destroy target nonland permanent.

{3}, {T}: Target creature gains first strike until end of turn.

Visit — Exile cards from the top of your library until you exile a nonland card, then choose a legendary creature card name with the same mana value as that card. Create a token that's a copy of the card with the chosen name. That token gains haste. Exile it at the beginning of the next end step.

When Gallifrey Council Chamber enters the battlefield, surveil 1.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a Time Lord or Alien spell or activate an ability of a Time Lord or Alien.

{3}, {T}, Tap three untapped Humans you control: Destroy target creature. Its controller creates a 1/1 white Spirit creature token with flying.