Waste Not is INSANE
However, if Mono-White Aggro needs to adopt a way to win attrition battles, it has that option

DotP 2009 Xbox 360 Garruk Wildspeaker ( Duels of the Planeswalkers ) (foil alternate art) PC Nissa Revane ( Duels of the Planeswalkers ) (foil) [80] PlayStation 3 Liliana Vess ( Duels of the Planeswalkers ) (foil alternate art) DotP 2012 PC Frost Titan ( Duels of the Planeswalkers ) (foil alternate art) [81] Xbox 360 Grave Titan ( Duels of the Planeswalkers ) (foil alternate art) PlayStation 3 Inferno Titan ( Duels of the Planeswalkers ) (foil alternate art) DotP 2013 PC, iPad Serra Avatar ( Duels of the Planeswalkers ) PlayStation 3 Vampire Nocturnus ( Duels of the Planeswalkers ) Xbox 360 Primordial Hydra ( Duels of the Planeswalkers ) DotP 2014 PC, iPad, Android Scavenging Ooze ( Duels of the Planeswalkers ) (foil) PlayStation 3 Ogre Battledriver ( Duels of the Planeswalkers ) (foil) Xbox 360 Bonescythe Sliver ( Duels of the Planeswalkers ) (foil) DotP 2015 Xbox 360, Xbox One - Soul of Ravnica ( Duels of the Planeswalkers ) (foil) PC, iPad, Android - Soul of Zendikar ( Duels of the Planeswalkers ) (foil) Gift Box promos[] Resale promos[] Included in special blister packs that include three random Magic booster packs plus the foil promo

#18 This pokemon is ruined forever
Booster boxes are the best type of box to buy, and these are where you can find some of the most rare and valuable cards
The answer depends on budget, card value, and personal preference