Setzer, Wandering Gambler Theres not much risk when flipping coins with Setzer, Wandering Gambleronly upside
The ones with the right creature types have priority, and I think its hard to argue against Kytheon, Hero of Akros

Here some: BG - Golgari Ivy Lane Denizen + Rendclaw Trow + Viscera Seer = infinite scry Reins of the Vinesteed + Warehouse Tabby = infinite death trigger (need a rat enchanted with Reins of the Vinesteed) Basking Broodscale + Sadistic Glee = infinite +1/+1 counter on Basking Broodscale Ivy Lane Denizen + Rendclaw Trow + Bloodthrone Vampire = infinite large creature (VARIANT: can use any green creature with persist) Ivy Lane Denizen + Rendclaw Trow + Viscera Seer = infinite scry Ivy Lane Denizen + Rendclaw Trow + Viscera Seer + Deathgreeter = infinite scry, infinite life Ivy Lane Denizen + Rendclaw Trow + Ashnod's Altar + Essence Warden = infinite mana, infinite life BR - Rakdos Ardent Elementalist + Fake Your Own Death + Thermopod = infinite death trigger, infinite ETB, infinite storm count First Day of Class + Putrid Goblin + Skirk Prospector = infinite red mana (VARIANT: any creature with persist + Thermopod) C - Colorless Ashnod's Altar + Foundry Inspector + Myr Retriever + Workshop Assistant = infinite colorless mana G - Green Careful Cultivation + Pili-Pala = infinite mana Ashnod's Altar + Pili-Pala + Presence of Gond = infinite mana Devoted Druid + Ivy Lane Denizen + Presence of Gond = infinite elf token Ivy Lane Denizen + Aerie Ouphes = infinite damage on flying creature, infinite ETB RG - Gruul Hangar Scrounger + Seeker of Skybreak = infinite scry (only when Hangar Scrounger ETB) Sprout Swarm + Blisterspit Gremlin + Thermo-Alchemist + Thunderscape Familiar + Unruly Catapult = infinite saproling token (VARIANT: any ETB untap, any spell reduction cost, any untap on cast) UBG - Sultai Freed from the Real + Karametra's Favor + Servant of Tymaret = infinite life drain UB - Dimir Freed from the Real + Dimir Aqueduct + Wind Zendikon = infinite black mana (VARIANT: use any two mana land provinding blue and any turn to creature effect) Disciple of the Vault + Undercity Scrounger + Freed from the Real = infinite life loss (Morbid required) UG - Simic Arbor Elf + Utopia Sprawl + Freed from the Real = infinite mana Freed from the Real + Axebane Guardian + Steel Wall = infinite mana (VARIANT: may use any defender instead of Steel Wall) Freed from the Real + Krosan Restorer = infinite mana Freed from the Real + Lifespark Spellbomb + Simic Growth Chamber = infinite green mana Freed from the Real + Axebane Guardian + Steel Wall + Viridian Longbow = infinite damage Freed from the Real + Karametra's Favor + Deepwater Hypnotist = infinite fog Freed from the Real + Karametra's Favor + Sphinx's Disciple = infinite draw Elvish Aberration + Energy Refractor + Freed from the Real = Infinite mana Axebane Guardian + Steel Wall + Vigean Graftmage + Excavated Wall = infinite mana URG - Temur Freed from the Real + Orochi Leafcaller + Zhur-Taa Druid = infinite damage Morselhoarder + Sinking Feeling + Viridian Longbow = infinite damage U - Blue Archaeomancer + Ghostly Flicker + Peregrine Drake = infinite mana NOT LEGAL Archaeomancer + High Tide + Snap = infinite ETB, infinite storm count NOT LEGAL Banishing Knack + Battered Golem + Lotus Petal = infinite ETB, infinite storm count (VARIANT: Retraction Helix,Mirran Spy, any 0 mana artifact add Golem Foundry for infinite golem token) Retraction Helix + Zephyr Scribe + Spidersilk Net + Elusive Spellfist = infinitely large unblockable creature WB - Orzhov Ashnod's Altar + Disciple of the Sun + Kaya's Ghostform = infinite colorless mana (VARIANT: Viscera Seer infinite scry) Spirit en-Kor + Daru Spiritualist + Severed Strands = Infinite life (VARIANT: Nomads en-Kor) WG - Selesnya Midnight Guard + Presence of Gond = infinite elf token Presence of Gond + Devoted Druid + Sigil of the Nayan Gods = infinite elf token WR - Boros Crown of Flames + Mogg War Marshal + Tethmos High Priest + Skirk Prospector = infinite goblin token WUB - Esper Songs of the Damned + Mnemonic Wall + Energy Refractor + Cavern Harpy + God-Pharaoh's Faithful = Infinite mana (need 11 creatures in gy) Songs of the Damned + Mnemonic Wall + Energy Refractor + Cavern Harpy + Basilica Screecher = infinite life loss (need 11 creatures in gy) WU - Azorius Retraction Helix + Midnight Guard + Soul's Attendant + Ornithopter = infinite life Retraction Helix + Stonybrook Schoolmaster + Mirran Spy + Ornithopter = infinite merfolk token Retraction Helix + Stonybrook Schoolmaster + Mirran Spy + Ornithopter + Sage's Row Denizen = infinite merfolk token, infinite mill Retraction Helix + Stonybrook Schoolmaster + Mirran Spy + Ornithopter + Judge of Currents = infinite merfolk token, infinite life ONLY PDH BR - Rakdos Ashnod's Altar + First Day of Class + Murderous Redcap = infinite damage, infinite colorless mana BG - Golgari Devoted Druid + Quillspike = Quillspike with infinite strenght and toughness U - Blue Freed from the Real + Malcolm, Keen-Eyed Navigator + Viridian Longbow = infinite damage Energy Refractor + Freed from the Real + Vhal, Candlekeep Researcher + Viridian Longbow = infinite damage UR - Izzet Alena, Kessig Trapper + Energy Refractor + Freed from the Real = Infinite mana (need a creature with powet at least 3 that entered the battlefield this turn, need a blue partner commander) G - Green Essence Warden + Lurking Roper + Presence of Gond = infinite life, infinite elf token Ivy Lane Denizen + Scurry Oak = infinite counter on Scurry Oak, infinite squirrel token UG - Simic Freed from the Real + Gyre Engineer = infinite green mana Freed from the Real + Ley Weaver = infinite mana (need at least a land that add for blue and another land) W - White Abdel Adrian, Gorion's Ward + Journey to Nowhere + Oblivion Ring = infinite soldier token (VARIANT: add any nonland permanent with ETB effect ) WG - Selesnya Ashnod's Altar + Ivy Lane Denizen + Kitchen Finks = infinite life, infinite colorless mana (VARIANT: Master Chef) Ender666666 on Murders and Acquisitions (Marchesa Superiority) 3 years ago Oh, and why not First Day of Class

Aang helps you draw cards for bending, great
Character cards consistently grade higher than Hyper Battle foilsa critical advantage given pristine copies 400%+ premium over played ones