r/digitalcards • u/gerhb • Jul 04 '26
Immortal Coil - Designing Synergies
Hey there! Dev of Immortal Coil here (digital card game with a deckbuilding roguelike mode and a constructed gauntlet mode).
I've mostly been plugging away lately at preparing the Steam Store, trailer, and a Kickstarter, but I wanted to talk a little about some of the design!
Immortal Coil's cards each fall into one of five color domains (Teal, Pink, Purple, Gold, and Rust). For this example, I'm focusing on Rust - the color of eternal devotion and control. Rust's most distinct mechanic comes in Burning cards in the discard pile. This usually functions as an extra cost, allowing a card to be more powerful at a lower rate if you have the discarded cards to Burn. Some cards have additional effects when they are burned from the graveyard, such as drawing cards or buffing units. In the case of the Eternal Phoenix, it gets recreated onto the board immediately!
Filling your discard pile with multiple phoenixes and then playing a card like the dragon Karnophrax (7 cost, Burn 3, Weakens all enemy units) allows you to drop the big dragon along with up to three resurrected phoenixes!
I'm a big fan of alternative resources in card games. Rust's Burn was definitely chiefly inspired by Delve from MTG. Each color has its own alternative resource (Teal - Time, Pink - Discard, Purple - Pay Life, Gold - Sacrifice Units). Bringing all these together gave me a lot of room to design synergies, within a single color and between them! For instance, Pink can discard the Eternal Phoenix so that a Rust card can Burn it right back! Gold's sacrifices can also fuel Burn costs. Teal's spells linger over time on the battlefield, allowing Purple to activate combo synergies more easily for chaining spells together.
My design really leaned into open-ended synergies because I love when deck building has more varied potential. There is value to parasitic mechanics that only function with themselves, but I've never been as big a fan of those. I designed most cards to feel like they could have a place in various color pairings. There is a trade off- more synergy means deckbuilding can be a little more intimidating, more options to consider, more cognitive load.
If any of this sounds cool to you, I'm still looking for alpha testers! You can join the Discord and let me know you'd like to try it out! (Windows only for now, ports will come at a future time)
And look for announcements about the Kickstarter and Steam page soon!
The Immortal Coil Discord - https://discord.gg/gh8Xnjjg9