{T}, Untap a tapped land an opponent controls: Add one mana of any type that land could produce.

Branded Brawlers can’t attack if defending player controls an untapped land.

Branded Brawlers can’t block if you control an untapped land.

Flying

If you control five or more untapped lands, Dust Animus enters the battlefield with two +1/+1 counters and a lifelink counter on it.

Plot {1}{W} (You may pay {1}{W} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Fen Stalker has fear as long as you control no untapped lands. (It can’t be blocked except by artifact creatures and/or black creatures.)

Hazy Homunculus can’t be blocked as long as defending player controls an untapped land.

Ignition Team enters the battlefield with X +1/+1 counters on it, where X is the number of tapped lands on the battlefield.

{2}{R}, Remove a +1/+1 counter from Ignition Team: Target land becomes a 4/4 red Elemental creature until end of turn. It’s still a land.

Whenever Keldon Berserker attacks, if you control no untapped lands, it gets +3/+0 until end of turn.

{1}{R}, Discard a land card: Living Twister deals 2 damage to any target.

{G}: Return a tapped land you control to its owner’s hand.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature’s color.)

When Martyr’s Soul enters the battlefield, if you control no tapped lands, put two +1/+1 counters on it.

When Nantuko Shaman enters the battlefield, if you control no tapped lands, draw a card.

Suspend 1—{2}{G}{G} (Rather than cast this card from your hand, you may pay {2}{G}{G} and exile it with a time counter on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)

As Pallimud enters the battlefield, choose an opponent.

Pallimud’s power is equal to the number of tapped lands the chosen player controls.

Scoria Cat gets +3/+3 as long as you control no untapped lands.

Spur Grappler gets +2/+1 as long as you control no untapped lands.

At the beginning of each player’s end step, that player sacrifices an untapped land.

Veteran Brawlers can’t attack if defending player controls an untapped land.

Veteran Brawlers can’t block if you control an untapped land.

Vintara Snapper has shroud as long as you control no untapped lands. (It can’t be the target of spells or abilities.)