The idea for this thread originates from discussion on Discord. @Daikenkini suggested it first. Happy now? XD
Want to compile a list of cool and (some) not so obvious synergy between cards in the game, especially with the new cards from the Oversky expansion:
- Yakkapult + Frog Tosser + Mirror Phantasm + Azure Skywhale + Orosei (Orosei is great with 6 and 7 cost creatures)
- Cap-10 combat draws Gift of Steel to flip Faeries
- Balloon Fish / Cartographer / Deathwish Ghoul + Doomsday
- Earthcraft draw to (hopefully) flip Faeries
- Flash Salmon + Faeries (Salmon dies at end of your turn before opponent’s turn, capable of flipping faeries)
- Dream Keeper + Drakkar Skycaptains for more than +3/+3 buff on flyers, and to flip Faeries
- Iona’s Smile + Drakkar Skycaptain
- Curious Biomancer -> Plague Bearer against Swarm
- Fugoro -> Ulani’s Medallion + Aurora’s Creation + Sky Yaks / Emperor Kaios in Swarm decks
- Emperor Kaios + Forbidden Library + Imperial Engineer
- Radiance with any card which deals self-damage like Forbidden Library, Gnats, etc.
- Summoning Krog’s Dinner to draw Krog flips Gabrian Commander
- Triton Banquet for surprise mobility in non-Blue decks
- Aurora’s Dream + Meteor + Yak Attack
- Tale of Old Turtles / Aurora’s Creation / Dream Keeper / Gemshell Tortoise + Illusion of Grandeur
- Shifting Octopus -> 3/7 + Feed the Forest to generate Faeria (usually used with Living Willow)
- Failed Experiment or Feed the Forest when summoning Istanu so new Istanu can attack straightaway countering Swallow
- Failed Experiment + Dream Keeper for 1 cost hand shuffle/reduction
- Ruunin the Relentless + Feed the Forest
- Path to Paradise with Yellow Haste and Dash Creatures (Good with Rakoan Chieftain), as well as Fight creatures like Frog Tosser and Deepwood Stalker
- Failed Experiment + Stormspawn
- Does Aurora’s Creation on Sky Yaks buff Illusion of Grandeur?
- Mistral Guide + Yak Attack / Wind Soldier for double to quad collect of Faeria
- Seifer Blood Tyrant / Combat Creatures + Grappling Hook
- Intrepid Explorer + Windstorm Charger
- Shayton Monstrosity in Sacrifice decks
- Ulani Oversky Shaman / Curious Biomancer can target draw if deck is designed with this in mind (e.g. Sky Yaks, Gift of Rakoa, Garudan)
- Gift of Rakoa in Swarm or OTK (One turn kill) decks
- Dream Keeper + Flight of the Manta to generate even more events (may not be working as intended)
- Balloon Fish swallows Oversky Towship, teleport land when Fish dies
- The Tree of Everlife + Forbidden Library (Tree protects orb from fatigue and library self-damage)
- Feed the Forest + Emerald Salamander (can summon multiple Salamander in the same turn on the same tile with feed)
- Cap-10 combat prevents fatigue by adding Gift of Steel to deck
- Steam Forge + Long-horned Yak + Rakoan Reveller + Shayton Monstrosity + Kobold Warlord
- Balloon Fish + Famine / Plague Bearer
- Dream Keeper + Forbidden Library
- Architect + Doomgate / Crystal Flower / Faeria Tree
- Oversky Towship + Flash Wind / Celestial Tower / Triton Banquet
- Magda + Ruunin (to permanently reduce cost of Ruunin to 3 while Magda stays on board)
- Wandering Monk with cards which draw more cards (Dream Keeper, Curious Biomancer, Tale of Old Turtles, Forbidden Library, Iona’s Smile, Lore Thief, etc)
- Wild Avenger + Feed the Forest with self-damage cards like Gnats, Forbidden Library, etc. Each self-damage throughout the game represents 1 Faeria with each Wild Avenger + Feed combo.
- Weeping Idol + self-damage (drawback is you need to summon Weeping Idol before self-damage to gain Faeria, unlike Wild Avenger + Feed combo)
- Emperor Kaios + Emperor’s Command + Azarai
The ones below are more fun than good in actual games:
- Possessed Ursus + Falcon Dive / Famine / Derelict Tower / Plague Bearer
- Sharra + Elderwood Embrace + Shamanic Dance
- Mistral Guide + Bomb Slinger / Blazing Salamander / Daring Adventurer
- Apex Predator + Aurora’s Creation (weak)
- Tarum + Everbloom Wisp
Pandora
- Void Guardian + Hammer of Destruction
- Ulani’s Medallion + Equinox Automaton
Will update as more ideas come up. Please share your ideas too. 
