Circadian StruggleHow it works & interactions with other cards

What it Does

Circadian Struggle uses the 'Seek' mechanic, which means it automatically grabs cards from your library without you having to search or shuffle manually. The number of cards you Seek, as well as the specific color requirements for those cards, is determined by the number of colors among permanents you control at the moment the spell resolves. Additionally, it applies a perpetual discount to every card found this way based on your color count.

Step-by-Step Resolution

First, the game counts how many colors are represented among permanents you control (White, Blue, Black, Red, and Green). If you control a Blue creature and a Green land, X is 2. Second, the game Seeks X cards from your library that share at least one color with your current permanents. Third, each of those Seeked cards gains a perpetual ability: 'This spell costs {1} less to cast' for each color counted in the first step. If X was 2, each card gets {2} cheaper forever.

Common Mistakes

A common point of confusion is how the cost reduction scales. The reduction is not based on the colors of the individual cards found, but on the total number of colors among permanents you controlled during resolution. Also, remember that 'permanents' includes lands, but most lands are colorless and will not contribute to the count of X unless they have an ability or effect making them a specific color.

When to Play It

This spell is best utilized in 'Five-Color' or 'Domain' style decks where you can reliably have three or more colors on the battlefield. Because it is an instant, you can cast it at the end of your opponent's turn to refuel your hand and prepare for a discounted explosive turn. It is particularly effective when you have at least one multi-colored permanent, as that single card helps satisfy multiple color requirements for the Seek effect.

Interaction examples

Finding a Discounted Finisher

Return of the Wildspeaker

If you control a Green creature and a Blue enchantment, you cast Circadian Struggle. The game sees two colors (Green and Blue), so you Seek two cards that are either Green or Blue. If you Seek Return of the Wildspeaker, it will perpetually cost {2} less to cast, meaning you can later cast it for just {3} mana to draw cards or buff your team.

Freeing Up Interaction

Force of Will

Imagine you control permanents representing all five colors. When Circadian Struggle resolves, you Seek five cards, and each one gets a {5} discount. If you Seek Force of Will, its mana cost is reduced by {5}. Since its original cost is {3}{U}{U}, the generic mana is fully covered, allowing you to cast it for just {U}{U} without needing to exile a card or pay life.