Assure // Assemble [Guilds of Ravnica]Set: Guilds of Ravnica Type: Instant Instant Rarity: Rare Cost: {G W}{G W} {4}{G}{W} Put a +1 +1 counter on target creature. That creature gains indestructible until end of turn. Reverse Type: Instant Create three 2 2 green and white Elf Knight creature tokens with vigilance.

but you will tire before it does

both living and dead

create a 2/2 green Wolf creature token that's tapped and attacking for each creature card in your graveyard

After my day

Set: Unlimited Edition Type: Instant Rarity: Uncommon Cost: {R} Destroy target Wall

Set: Battle for Zendikar Prerelease Promos Type: Sorcery Rarity: Rare Cost: {3}{W}{W} Destroy all nonland creatures

Set: Fossil 1st Edition Type: Grass Rarity: Common Retreat cost: Colorless

defending player discards a card

you may exile target non-Angel creature you control

Set: Beta Edition Type: Artifact Rarity: Uncommon Cost: {3} {2}

Set: Scourge Type: Instant Rarity: Rare Cost: {U} Counter target activated or triggered ability

but few of the answers