Manabase tool
How To Use
Deck Loader
Paste your decklist into the entry box. Most online deckbuilders will have an "export" or "export to Arena" feature to let you copy your decklist in the right format.
Moxfield: More -> Export -> Copy for MTGO. Do not use "Copy for MTGA" as it will remove any cards that aren't in the Arena card pool
Archidekt: Extras -> Export Deck -> Copy. Make sure to uncheck "Include out of deck cards" If you have a maybeboard for your deck
TappedOut: Download / Esport / Embed Code -> Copy to Clipboard
deckstats.net: Tools -> Decklist
MTGGoldfish: Export to Arena
Scryfall: Export -> Copy to Clipboard
Click "Load" to retrieve the cards in your deck from our database
Click "Compute" to analyze your deck
Color Analyzer
The color analyzer is built to test how well your deck's manabase can support its spells, and identify where it needs improvement. It does so by calculating 2 metrics:
Cast rate: For a spell with a mana value of X, what is the probability that you will have the mana available to cast it on turn X?
Average Delay: On average, how many turns do you have to wait past turn X to be able to cast a spell? (this includes cases where it can be cast immediately)
These two tend to be fairly closely related, with a lower cast rate leading to a higher cast delay. However, cast delay can account for colors that have fewer sources in your deck and take longer to topdeck
In general, a 90% cast rate or 0.3 average delay indicates that your deck has strong support from its manabase, while an 80% cast rate or 0.6 average delay is in need of improvement
This analyzer recommends improvements by calculating these values for multiple variations on your manabase: one with an extra wastes, and one for each basic land type with an extra copy of that land
The "+1 Wastes" variation is a good metric for how well your deck can support the mana values of your cards. If it's coming back with more than +1% cast rate and -0.03 average delay, your deck probably needs more lands in general
The "+1 Basic" variations act as metric for how well your deck can support the color requirements of your cards. If the "+1 Plains" variation is only slightly better than the "+1 Wastes" variation, then your deck has the support for white it needs. But if it is a much larger improvement than "+1 Wastes", then your deck might need more white sources in general
Tap Analyzer
The tap analyzer is built to test how often your lands enter untapped, and how that effects your curve out. For the lands that enter untapped under certain conditions, it calculates the likelihood of your deck meeting those conditions. It then uses this to find the overall rate at which your lands enter tapped.
The tool uses this rate to simulate the opening turns with your deck and score how well it can cast its spells. It then runs this test again for two different versions of your deck: One with one less tap land, and one with zero tap lands. Based on the difference between the results of these two tests and the first one, it calculates the impact of tap lands on your early game.
What does this model take into account?
What this model takes into account:
Ramp in the form of mana rocks, mana dorks, and cards that tutor lands into play
MDFCs (played land-side if a land is needed)
Landcycling (stand-in for a land as long as the cycling cost is consistently payable)
A handful of common discounted cards (others can be manually reduced)
Fetchlands—fetch target probability is split between the optimal grab and a random grab
X spells—X is set to 3 for single X costs, X=2 for double, and X=1 for triple
Cards that tutor for basic lands
Mulligans—the model uses Frank Karsten’s mulligan heuristic for obtaining a hand with an acceptable number of lands
What this model does NOT take into account:
Draw and filtering to find more lands, in ANY form. We have our reasons for this, but it does lead to some issues with certain deck types and with higher-costed cards. Stay tuned for future features to help with this
Cards that “cheat” spell costs such as Reanimate, Sneak Attack, and Omniscience (there is a feature for ignoring cards you expect to cheat out)
Less common forms of ramp, such as cost reducers, rituals, cards that untap lands, auras that modify lands, and rocks/dorks with unconventional activation costs (e.g. Springleaf Drum)
Treasures, powerstones, and other ramp-oriented tokens
Ramp in the command zone
Playing lands off the top of one’s library
Using general purpose tutors to find lands
Colorless and snow costs
Kicker and similar modal-costed mechanics
These tools were based in part on Frank Karsten's article How Many Sources Do You Need to Consistently Cast Your Spells? A 2022 Update, specifically as it pertains to approximating ramp, fetch lands, and other complex mana sources.
Side note from Snail: I'll probably throw some ads on here at some point, but in the mean time if you want to support me and help pay development costs for improvements to this tool, you can support me over on Patreon.