Forbidding Watchtower enters the battlefield tapped. {T}: Add {W}. {1}{W}: Forbidding Watchtower becomes a 1/5 white Soldier creature until end of turn. It's still a land.
{T}: Add {C}. {T}, Sacrifice Foreboding Landscape: Search your library for a basic Swamp, Forest, or Island card, put it onto the battlefield tapped, then shuffle. Cycling {B}{G}{U}
As Foreboding Ruins enters the battlefield, you may reveal a Swamp or Mountain card from your hand. If you don't, Foreboding Ruins enters the battlefield tapped. {T}: Add {B} or {R}.
Sent to find Sorin, Jace ventured to the vampire's ancestral home, only to find evidence of a deeper mystery.
{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.
History is not delicately woven. It is hammered with fire.
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.
As Fortified Beachhead enters the battlefield, you may reveal a Soldier card from your hand. Fortified Beachhead enters the battlefield tapped unless you revealed a Soldier card this way or you control a Soldier. {T}: Add {W} or {U}. {5}, {T}: Soldiers you control get +1/+1 until end of turn.
As Fortified Village enters the battlefield, you may reveal a Forest or Plains card from your hand. If you don't, Fortified Village enters the battlefield tapped. {T}: Add {G} or {W}.
Fountain of Cho enters the battlefield tapped. {T}: Put a storage counter on Fountain of Cho. {T}, Remove any number of storage counters from Fountain of Cho: Add {W} for each storage counter removed this way.
As Frostboil Snarl enters the battlefield, you may reveal an Island or Mountain card from your hand. If you don't, Frostboil Snarl enters the battlefield tapped. {T}: Add {U} or {R}.