Think Twice [Ultimate Masters] Horse sacrifice it unless you return

sacrifice it unless you return three basic lands you control to their owner's hand

Set: Mystery Booster Type: Instant Rarity: Common Cost: {2}{U} Improvise (Your artifacts can help cast this spell

If you would roll one or more six-sided dice

it deals damage equal to its power to target creature with flying an opponent controls

Set: Fallout Type: Artifact — Equipment Rarity: Rare Cost: {1} Whenever equipped creature attacks

Think Twice [Ultimate Masters] Horse sacrifice it unless you returnSet: Ultimate Masters Type: Instant Rarity: Common Cost: {1}{U} Draw a card. Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.) "Either I know just the spell I need, or I'm about to."