Advanced Search Sets Random Syntax Aardwolf's Advantage Abandon Reason Abandon the Post Abbot of Keral Keep Abomination, World Ravager About Face Abrade Abstract Iguanart Academic Dispute Academy Raider Accelerate Acceptable Losses Acidic Soil Acolyte Hybrid Acolyte of the Inferno Acquired Mutation Act of Aggression Act of Treason Act on Impulse Active Volcano Adamaro, First to Desire Adder-Staff Boggart Adrenaline Jockey Advanced Reconstruction Aether Chaser Aether Refinery Aether Revolt Aethertorch Renegade Afflicted Deserter Aftershock Agate Assault Agate Instigator Agent of Stromgald Aggravate Aggravated Assault Aggression Aggressive Mining Agility Agitator Ant Ahn-Crop Crasher Ahn-Crop Invader Ainok Tracker Airdrop Condor Akki Avalanchers Akki Battle Squad Akki Blizzard-Herder Akki Coalflinger Akki Drillmaster Akki Ember-Keeper Akki Lavarunner Akki Lavarunner Akki Raider Akki Rockspeaker Akki Ronin Akki Scrapchomper Akki Underling Akki Underminer Akki War Paint Akoum Battlesinger Akoum Boulderfoot Akoum Firebird Akoum Flameseeker Akoum Hellhound Akoum Hellkite Akoum Stonewaker Akoum Warrior Akroan Conscriptor Akroan Crusader Akroan Line Breaker Akroan Sergeant Akroma, Angel of Fury Aladdin

The baseline effect is good, you get your mana back, but in EDH this can easily become a game-winning play
Gifts Ungiven Any card that has spawned multiple deck archetypes has earned a place in the Top 10 in my book
Mortify Mortify used to look like the runt of the litter when placed next to Putrify but Theros block has thrown in a bunch more targets for the card
This one certainly does in the format in which huge spells are commonly a thing
Now, what happens if you have a lot of enchantments in play and a card that gives +1/+1 for each of them to an unkillable creature, and you also manage to give it trample with the likes of Rancor