The calculator allows you to input variables in four categories: surface , centering , corners , and edges
Healing Salve was the worst on this list, as gaining or preventing three life is not as good as, say producing three mana, just outright making your creature +3/+3, killing a creature/dealing damage, or drawing three cards

Anger of the Gods Approach of the Second Sun Barren Moor Behold the Beyond Boros Guildgate Breeding Pool Cascading Cataracts Cleansing Nova Cloudform Cloudstone Curio Commence the Endgame Cradle of the Accursed Crater's Claws Desert Twister Dictate of Karametra Doomsday Drown in Sorrow Dusk // Dawn Dusk // Dawn Encroaching Wastes Endless Sands Extraplanar Lens Fade into Antiquity Font of Vigor Forest Forgotten Cave Frenzied Tilling Giant Growth Godless Shrine Guardian of Pilgrims Highland Lake History of Benalia Horizon Canopy Horizon Stone Indatha Triome Island Izzet Guildgate Jaya's Immolating Inferno Jeskai Barricade Kamahl's Druidic Vow Karn's Temporal Sundering Kjeldoran Outpost Leyline of Abundance Leyline of Anticipation Leyline of Combustion Leyline of Sanctity Leyline of the Void Lightning Bolt Lonely Sandbar Mizzium Mortars Mountain Needleverge Pathway New Horizons Nomad Outpost Nurturing Peatland Overgrown Tomb Pillarverge Pathway Pinnacle of Rage Plains Plateau Port Town Primevals' Glorious Rebirth Prophetic Prism Rise of Eagles Sacred Excavation Sacred Foundry Seal of Cleansing Seal of Strength Secluded Steppe Self-Assembler Song of Creation Spelltwine

If you have a key character they really need to remove, but dont want to challenge it blocks any alternative
Paired with cards like Narset, Parter of Veils or Sheoldred, the Apocalypse, this card does work
It may not have the same headline value as Gardevoir or Lucario, but for collectors who love the Legendary Pokmon, this card is one of the best in the set