While we dont HAVE to make every two cards go infinite, why wouldnt we, if we can
If you happen to gain three or more life at the start of each turn, Gwaihir makes a 3/3 Bird creature token

Synthoids Aang and La, Ocean's Fury Aang, Destined Savior Aang, Master of Elements Aarakocra Sneak Abbot of Keral Keep Aberrant Aberrant Manawurm Aberrant Mind Sorcerer Aberrant Researcher Abhorrent Oculus Aboleth Spawn Abolisher of Bloodlines Abominable Treefolk Abomination, Irradiated Brute Abomination, Terrifying Titan Abomination, World Ravager Aboroth Aboshan, Cephalid Emperor Absorbing Man Absorbing Man and Titania Abstract Iguanart Abstract Paintmage Abstruse Archaic Abundant Maw Abzan Beastmaster Abzan Kin-Guard Academy Drake Academy Elite Academy Journeymage Academy Loremaster Academy Manufactor Academy Raider Academy Researchers Academy Wall Accomplished Alchemist Accomplished Automaton Ace, Fearless Rebel Acid Web Spider Acidic Slime Acidic Slime Acolyte Hybrid Acolyte of the Inferno Acquisition Octopus Acridian Adamaro, First to Desire Adaptive Automaton Adaptive Shimmerer Adaptive Snapjaw Adaptive Sporesinger Adarkar Sentinel Adarkar Windform Adder-Staff Boggart Adeliz, the Cinder Wind Adrenaline Jockey Adric, Mathematical Genius Adrix and Nev, Twincasters Advanced Hoverguard Advanced Stitchwing Advocate of the Beast Aegar, the Freezing Flame Aegis Automaton Aegis Sculptor Aegis Turtle Aeon Chronicler Aerial Caravan Aerial Doombot Aerial Guide Aerie Bowmasters Aerie Ouphes

Matt Tabak (June 22, 2015)
In Wilds Unknown, enchanted prices range from ~$55 to ~$410