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Legality
| Format | Legality |
| 1v1 Commander | Legal |
| Archenemy | Legal |
| Block Constructed | Legal |
| Canadian Highlander | Legal |
| Casual | Legal |
| Commander / EDH | Legal |
| Commander: Rule 0 | Legal |
| Custom | Legal |
| Duel Commander | Legal |
| Freeform | Legal |
| Highlander | Legal |
| Legacy | Legal |
| Leviathan | Legal |
| Limited | Legal |
| Oathbreaker | Legal |
| Planar Constructed | Legal |
| Planechase | Legal |
| Quest Magic | Legal |
| Vanguard | Legal |
| Vintage | Legal |
Rules Q&A
The Seventh Doctor
Legendary Creature — Time Lord Doctor
When The Seventh Doctor attacks, choose a card in your hand. Defending player guesses whether that card's converted mana cost/mana value is greater than the number of artifacts you control. If they guessed wrong, you may cast it without paying its mana cost. If you don't cast a spell this way, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")
Rhadamanthus on Seventh Doctor
7 months ago
The reason it works that way is because the rules actually establish a system of timing permissions rather than restrictions. The rules say things like "you can do [N] at such and such time", not things like "you can't do [N] except for at such and such time". The special instruction given to you in the effect of The Seventh Doctor and other cards that tell you to cast a spell during the resolution of another effect don't conflict with any restrictions in the rules.
There is one true timing "restriction" that I can think of. There's a rule that specifically says you can't play lands on someone else's turn, but that's all I'm aware of.
thar_b_dragons on Seventh Doctor
7 months ago
Am I correct in assuming that when The Seventh Doctor's first ability triggers, since it triggers during combat, even if they do guess wrong I could only actually cast it if it is an Instant or a card with Flash? I don't see any text that would let me ignore timing restrictions. Thanks.