There are a maximum of 38 Magic 2014 Duels of the Planeswalkers achievements (30 without DLC) worth 640
749 tracked gamers have this game, 71 have completed it (9.48%)
Achievement Details
Sparer of Pawns12
Win a game without destroying or dealing lethal damage to a creature

Unlocked by 497 tracked gamers (66%  TSA Ratio = 1.22)
749
Author  Solution 
Quoth_the_Raven
71,123
Achievement won on 22 Jan 15TSA Score for this game: 73
Posted on 12 March 16 at 00:31

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One of the easier ways to do this is on the Zendikar campaign < Survive the Roil. Use a green Garruck. Earthquake and massive monsters via green deck should net you the win pretty easily. Another way would be to use the Mind Maze deck for the use of flying creatures and an unsummon/counterspell to help aid in the removal of creatures. Or even a Firewave/Deadwalkers deck for direct player damage.
Here is a card list of the above decks so that you may choose which strategy may work best for you.
Hunter's Strength (Garruck deck) 
+ Rancor x 3 + Prey Upon x 4 + Green Sun’s Zenith x 1 + Kalonian Tusker x 3 + Garruk’s Companion x 3 + Predator Ooze x 1 + Eternal Witness x 2 + Pulse of the Tangle x 1 + Leatherback Baloth x 1 + Elephant Guide x 1 + Sacred Wolf x 2 + Oakenform x 1 + Master of the Wild Hunt x 1 + Hunt the Weak x 2 + Fangren Firstborn x 1 + Bellowing Tanglewurm x 1 + Overwhelming Stampede x 1 + Overrun x 2 + Enlarge x 3 + Vorapede x 1 + Primalcrux x 1 + Vigour x 1
Mind Maze 
+ Phantasmal Bear x 3 + Veiled Sentry x 2 + Unsummon x 4 + Phantasmal Image x 4 + Lord of the Unreal x 4 + Krovikan Mist x 1 + Gossamer Phantasm x 3 + Counterspell x 2 + Snapcaster Mage x 1 + Illusionary Servant x 3 + Frost Breath x 2 + Dream Fracture x 1 + Cancel x 2 + Phantasmal Dragon x 1 + Cryptic Command x 1 + Mind Control x 1 + Force of Will x 1 + Temporal Mastery x 1
Deadwalker 
+ Gravecrawler x 3 + Diregraf Ghoul x 2 + Vampiric Tutor x 1 + Reanimate x 1 + Black Cat x 3 + Walking Corpse x 2 + Doom Blade x 3 + Sign in Blood x 2 + Lord of the Undead x 2 + Geralf’s Messenger x 2 + Death Baron x 1 + Fleshbag Marauder x 2 + Grim Return x 1 + Death Cloud x 1 + Lilana’s Reaver x 1 + Undead Warchief x 1 + Grave Pact x 1 + Tendrils of Corruption x 2 + Mutilate x 1 + Consuming Vapors x 1 + Cruel Revival x 2 + Mikaeus the Unhallowed x 1 + Corrupt x 2
Firewave 
+ Grim Lavamancer x 2 + Goblin Arsonist x 3 + Disintegrate x 2 + Pillar of Flame x 2 + Flame Slash x 1 + Kiln Fiend x 3 + Reverberate x 1 + Searing Spear x 1 + Wild Guess x 1 + Chandra’s Phoenix x 2 + Chandra’s Spitfire x 1 + Sulfuric Vortex x 2 + Seismic Assault x 1 + Flamebreak x 1 + Flames of the Firebrand x 2 + Browbeat x 1 + Firewing Phoenix x 1 + Chandra’s Outrage x 2 + Magma Phoenix x 1 + Fire Servant x 2 + Lava Axe x 1 + Inferno Titan x 1 + Hostility x 1
If you have any suggestions lemme know in the comments! Good luck. 