Winter Orb

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Infernal Contract

Draw four cards. You lose half your life, rounded up.

Dark Ritual

Crop Rotation

As an additional cost to cast this spell, sacrifice a land.
Search your library for a land card, put that card onto the battlefield, then shuffle.

Lotus Vale

If Lotus Vale would enter, sacrifice two untapped lands instead. If you do, put Lotus Vale onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add three mana of any one color.

Twiddle

You may tap or untap target artifact, creature, or land.

Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.

Meditate

Draw four cards. You skip your next turn.