Rules glossary
↑ Parent rule: 601.6 If a player is no longer allowed to cast a spell after compl…
601.6a Once a player has begun casting a spell that had flash because certain conditions were met or that could be cast as though it had flash because certain conditions were met (see 601.3d), they may continue to cast that spell as though it had flash even if those conditions stop being met.
No sub-rules.