{T}: Add {C}. {1}: Blinkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying until end of turn. It's still a land. {1}, {T}: Target Blinkmoth creature gets +1/+1 until end of turn.
Cactus Preserve enters tapped. {T}: Add one mana of any type that a land you control could produce. {3}: Until end of turn, Cactus Preserve becomes an X/X green Plant creature with reach, where X is the greatest mana value among your commanders. It's still a land.
If you control two or more other lands, Cave of the Frost Dragon enters tapped. {T}: Add {W}. {4}{W}: Cave of the Frost Dragon becomes a 3/4 white Dragon creature with flying until end of turn. It's still a land.
{T}: Add {C}. {2}: Cavernous Maw becomes a 3/3 Elemental creature until end of turn. It's still a Cave land. Activate only if the number of other Caves you control plus the number of Cave cards in your graveyard is three or greater.
Many footprints lead into the cave. None lead out.
Celestial Colonnade enters tapped. {T}: Add {W} or {U}. {3}{W}{U}: Until end of turn, Celestial Colonnade becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.
Creeping Tar Pit enters tapped. {T}: Add {U} or {B}. {1}{U}{B}: Creeping Tar Pit becomes a 3/2 blue and black Elemental creature until end of turn and can't be blocked this turn. It's still a land.
If you control two or more other lands, Den of the Bugbear enters tapped. {T}: Add {R}. {3}{R}: Until end of turn, Den of the Bugbear becomes a 3/2 red Goblin creature with "Whenever this creature attacks, create a 1/1 red Goblin creature token that's tapped and attacking." It's still a land.
Domesticated Watercourse enters tapped. {T}: Add {U} or {B}. {U}{B}: Until end of turn, Domesticated Watercourse becomes an Equipment artifact with equip {2}. Whenever equipped creature deals combat damage to a player, draw a card.
Faerie Conclave enters tapped. {T}: Add {U}. {1}{U}: Faerie Conclave becomes a 2/1 blue Faerie creature with flying until end of turn. It's still a land.
Forbidding Watchtower enters 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}. {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.
Ghitu Encampment enters tapped. {T}: Add {R}. {1}{R}: Ghitu Encampment becomes a 2/1 red Warrior creature with first strike until end of turn. It's still a land.
If you control two or more other lands, Hall of Storm Giants enters tapped. {T}: Add {U}. {5}{U}: Until end of turn, Hall of Storm Giants becomes a 7/7 blue Giant creature with ward {3}. It's still a land.
Hissing Quagmire enters tapped. {T}: Add {B} or {G}. {1}{B}{G}: Hissing Quagmire becomes a 2/2 black and green Elemental creature with deathtouch until end of turn. It's still a land.
If you control two or more other lands, Hive of the Eye Tyrant enters tapped. {T}: Add {B}. {3}{B}: Until end of turn, Hive of the Eye Tyrant becomes a 3/3 black Beholder creature with menace and "Whenever this creature attacks, exile target card from defending player's graveyard." It's still a land.
If you control two or more other lands, Lair of the Hydra enters tapped. {T}: Add {G}. {X}{G}: Until end of turn, Lair of the Hydra becomes an X/X green Hydra creature. It's still a land. X can't be 0.
Lavaclaw Reaches enters tapped. {T}: Add {B} or {R}. {1}{B}{R}: Until end of turn, Lavaclaw Reaches becomes a 2/2 black and red Elemental creature with "{X}: This creature gets +X/+0 until end of turn." It's still a land.
Lumbering Falls enters tapped. {T}: Add {G} or {U}. {2}{G}{U}: Lumbering Falls becomes a 3/3 green and blue Elemental creature with hexproof until end of turn. It's still a land.
{T}: Add {C}. {1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {T}: Target Assembly-Worker creature gets +1/+1 until end of turn.
{T}: Add {C}. {2}: Mishra's Foundry becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {1}, {T}: Target attacking Assembly-Worker gets +2/+2 until end of turn.
{T}: Add {C}. {4}: Mobilized District becomes a 3/3 Citizen creature with vigilance until end of turn. It's still a land. This ability costs {1} less to activate for each legendary creature and planeswalker you control.
Sometimes the strongest weapon you can hold in your hand is another hand.