A few creature cards (like that good boy Underworld Rage-Hound) have abilities that say they escape with a number of +1/+1 counters

Be very careful when trading for the following cards on this list: Tropical Island Temple Garden Stomping Ground Overgrown Tomb Scared Foundry Breeding Pool Misty Rainforst Celestial Colonnade Flooded Strand Arid Mesa Wasteland Inkmoth Nexus Elspeth Sun's Champion Tarmogoyf Cavern of Souls Scalding Tarn Hallowed Fountain Polluted Delta Surgical Extraction Sol Ring Underground sea Maesh Flats Reflecting Pool Mutavault Wooded Foothills Windswept Health Watery Grave Godless Shrine Nykthos, Shrine to Nyx Savannah Blood Crypt Verdant Catacombs Kalonian Hydra Avacyn, Angel of Hope Thassa, God of the sea, Jace, Architect of Thought Swords to Plowshares Chalice of the Void Goblin guide it that betrays sword of war and peace sword of fire and ice purphoros god of the forge sun titan sensei's divining top demonic tutor elspeth knight-errant thoughtseize pernicious deed sword of feast and famine goblin lackey goblin pilcdriver inquistion of kozilek engineered explosives kokusho the evening star bonfire of the damned ral zarek stoneforge mystic lona shield of emeria spellskite karn liberated tundra path to exile figure of destiny Ather Vial Vampiric Tutor Snapcaster Mage Academy Ruins Batterskull Forcc of Will Leyline of Sanctity Intuition Sphinx's Revelation Reanimate New...er News

Lastly, this deck also runs a few other cards for protecting the hexproof creature, and your life total
Just a perfect balance of style, color, frame treatments and foiling
In general, I wouldnt include cards worth less than $1 in your trade binder simply because most players wont have a particular use for them
Sure, these ones were downshifted in rarity and could tap for colorless mana for no drawback, but theyre still bad at their job and not something you should go for