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Message: <blockquote data-quote="Staffan" data-source="post: 8297774" data-attributes="member: 907">Countdown is a really cool mechanic. If there's room, I'd add some guidelines about how more dice with a lower target number will give you a somewhat more predictable countdown – a slow one-die countdown and a medium 4-5-die countdown both take an average of 6 rounds, but the one-die countdown has about a 40% chance of expiring in three rounds or less, but the 4-die countdown only has about a 25% chance. So if it's "this could happen at any moment", go for fewer dice with a lower chance, and if it's more predictable, go for more dice with a higher chance. Also, I would have the countdown happen at the end of the round, so you don't run the risk of going "Ha-ha! Now you're going to have to fix this before I roll fives or sixes on these four dice... oops."(If you want to do math to it, calculating<code class="bbCodeInline">output [count {5,6} in 4d6]</code>will show you the probabilities of rolling 0 through 4 5s or 6s on 4d6 in Anydice. Cascading those through multiple iterations can get pretty complex however.)</blockquote>