In the case of Murders at Karlov Manor , 250 of each serialized card are potentially found in collector boosters
If enough spells have been cast its basically a 1-mana Counterspell
3 Bladewing the Risen Bladewing, Deathless Tyrant Blim, Comedic Genius Boris Devilboon Bullseye, Death Dealer Carnage, Crimson Chaos Chainer, Nightmare Adept Chaos, the Endless Crash, Reckless Endrider Desecrex, Gift of Servitude Dragonlord Kolaghan Exava, Rakdos Blood Witch Far Fortune, End Boss Flamewar, Brash Veteran Florian, Voldaren Scion Garland, Knight of Cornelia Garna, Bloodfist of Keld Garna, the Bloodflame Gev, Scaled Scorch Green Goblin, Nemesis Green Goblin, Revenant Grenzo, Dungeon Warden Greven, Predator Captain Grusilda, Monster Masher Imskir Iron-Eater Judith, Carnage Connoisseur Judith, the Scourge Diva Juri, Master of the Revue Kaervek the Merciless Kalain, Reclusive Painter Karazikar, the Eye Tyrant Kardur, Doomscourge Kefka, Dancing Mad Kellogg, Dangerous Mind Kethek, Crucible Goliath Kivni, Orb Weaver Kolaghan, the Storm's Fury Kroxa, Titan of Death's Hunger Kuja, Genome Sorcerer Lady Orca Lagomos, Hand of Hatred Laughing Jasper Flint Legate Lanius, Caesar's Ace Locke, Treasure Hunter Lucius the Eternal Lyzolda, the Blood Witch Madame Hydra Magar of the Magic Strings Mahadi, Emporium Master Malfegor Mary O'Kill Mauhr, Uruk-hai Captain Mishra, Claimed by Gix Mishra, Lost to Phyrexia Mishra, Tamer of Mak Fawa Mogis, God of Slaughter Monoxa, Midway Manager Neheb, the Worthy Nu and Sumi, Career Criminals Ob Nixilis, Captive Kingpin
The build above is inspired heavily by Gerry Thompsons work on the Izzet Artifact archetype, including the realization that Patchwork Automaton can be the glue this approach needed
when I think about adding lifegain cards to my decks, Im looking for this kind of incidental or burst lifegain, not lifelink creatures
It doesn't have any inherent rules meaning, but some Gates, including some found in this set, have abilities that care either about which other Gates you control or the number of other Gates you control
