Negate [Mystery Booster]Set: Mystery Booster Type: Instant Rarity: Common Cost: {1}{U} Counter target noncreature spell. "As one, nature lifts its voice to tell you this: 'No.'"

Sacrifice Quicksand: Target attacking creature without flying gets -1/-2 until end of turn

Set: Diamond & Pearl: Majestic Dawn Type: Item Rarity: Uncommon

Set: Neo Destiny Unlimited Type: Item Rarity: Rare

Whispering One

They only specify the consequences should you fail

Sometimes you have to search for inspiration

Set: Arena League 2001 Type: Sorcery Rarity: Rare Cost: {1}{G} Target player shuffles up to three target cards from their graveyard into their library

Set: Stronghold Type: Creature — Sliver Rarity: Uncommon Cost: {G}{W} All Slivers have "{2}

Set: Innistrad Type: Land Rarity: Rare Clifftop Retreat enters the battlefield tapped unless you control a Mountain or a Plains

Set: Commander Anthology Volume II Type: Legendary Creature — Giant Soldier Rarity: Mythic Cost: {2}{R}{W} Double strike

Set: Judge Gift Cards 2017 Type: Legendary Creature — Treefolk Shaman Rarity: Mythic Cost: {W}{B}{G} Each creature assigns combat damage equal to its toughness rather than its power

Koth Type: Creature — Elemental Rarity: Rare Cost: {3}{W}{U} Flying