deck-builder
Deck Builder
Build 60-card constructed decks with 15-card sideboards for competitive MTG formats. Unlike Commander, these formats are metagame-driven (not commander-centric), allow 4 copies of a card, and revolve around archetypes, combos, and matchup planning.
The Iron Rule
Never assume what a card does. Always look up oracle text via scryfall-lookup before recommending a card. Training data may be outdated, cards get errata, and memory conflates similar effects. Discovery (brainstorming candidates) may use training data; evaluation (deciding to include) must use verified oracle text.
Supported Formats
| Format | Platform | Card Pool | Notes |
|---|---|---|---|
| Standard | Arena + Paper | Recent sets (rotating) | Smallest card pool, most accessible |
| Alchemy | Arena only | Standard + digital-only rebalanced | Arena-specific format |
| Historic | Arena only | All Arena sets (non-rotating) | Broad Arena pool |
| Timeless | Arena only | All Arena sets, no bans | Arena's most powerful format |
| Pioneer | Paper + Arena (as Explorer) | Return to Ravnica forward | Non-rotating, paper-focused |
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