Use Sideboard and Maybeboard as deckbuilding tools
Stage incoming and outgoing cards, preserve alternatives and keep temporary ideas out of the counted Commander list.
Commander still has one counted list
Ordinary Commander does not use a tournament sideboard as a routine source of cards between games. In Esper Forge, Sideboard and Maybeboard are deckbuilding workspaces. The main deck and command zone determine saved legality and card count; staged alternatives do not silently make a 105-card list legal.
This distinction keeps experiments visible without confusing them with the list intended for play. Tokens remain separate again because they are game pieces created by cards, not optional spells waiting to enter the deck.
Stage a tune proposal symmetrically
A one-for-one tune puts the recommended incoming card in the Sideboard and the proposed outgoing card in the Maybeboard. The explanation connects them as a swap. Until the brewer presses Apply, the main deck remains unchanged and can still be validated against the version that produced the proposal.
If the deck changes manually, the proposal becomes stale. Recalculation is necessary because the outgoing card may no longer exist, the role counts may have changed or the deck may no longer have the same number of cards. Paying for recalculation reflects new engine work rather than an ordinary interface refresh.
Keep rejected ideas useful
A Maybeboard can preserve cards that were cut for curve, budget or local metagame reasons. Add a note outside the card name when the reason matters: better against graveyards, only for the token version or restore if the pod slows down. A pile with no rationale eventually becomes another unsorted collection.
Review alternatives after several games, not immediately after one loss. A card removed for poor performance may become correct when the mana base, commander or table changes. Keeping the candidate does not mean it should remain indexed as part of the public deck list.
Apply changes in a controlled order
Structural swaps should be applied before luxury upgrades. If an incoming draw engine requires another color source, the mana repair and the engine belong to the same test group. Applying isolated recommendations in a random order can create an intermediate deck that is legal but less functional.
After applying, check the counted total, command zone, color identity and role balance. Deck history then records the actual addition and removal. Clear staging zones when they no longer represent current choices, while retaining genuinely useful alternatives for the next testing cycle.
Open your workspace or start with a private guest draft.
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