MArcomage

I am interested in the probability of the three different cards: Common, Uncommon and Rare.
So, how high are the chances to get an Uncommon and a Rare card in percentage?
It would help me to create a better deck if I know the mathematic behind it.
Thx.

I should have read the manual first, sorry. It says:

The new card will be chosen randomly from the card groups with probabilities 65% for Common, 29% for Uncommon and 6% for Rare, unless a played card says otherwise.

I've been wondering how, if at all, the probability changes for cards that indicate a certain kind of card occurring, such as "Next card will be a Restoration card." I've noted that this causes the appearance of cards that aren't even in the player's deck. Are cards in the deck more likely than others to be drawn in such a case, or is it a flat probability?

It's a flat probability. When card with text "Next card recieved will be a restoration card" is played, next card will be randombly chosen from all cards that have restoration keyword (ignoring rarity). Also these cards are taken from all cards not just your deck.

> "Next card will be a Restoration card."
I always thought the probability of the draw is based on rarity. Thanks for the question. I learnt something new. ;)

This may be private information, but what is the formula for determining what card you will receive next?

I'm guessing you are asking the standard draw, so here is how it works:

1. Chances for common, uncommon and rare are 65%, 29% and 6%. Under these circumstances a random card is picked from your deck

2. System counts number of occurrences of the picked card already present in your hand. Based on this number he decides to keep the card as a result of this draw or he may decide to throw it away and start over. The probability that he will trow away the card is exponentially growing with the number of occurrences in hand. This is called the anti-flood mechanism. It minimizes the probability of having same cards on hand.

For example if I have 2 Draft cards on hand and system randomly picked another Draft to be the next card he will trow it away with the probability of 75%. In another words the system will keep the card with the probability of 1/2^{N} where N is the number of occurrences in hand.

But are there 2 parts to step 1? Selecting a C, U, R based on weight then randomly picking the cards from the given category?

Phase one first decides the rarity and then it pick one of the 15 cards randomly.

Btw here is the info on the random function we use: http://php.net/manual/en/function.mt-rand.php

Did not know of the anti-flood mechanism :O Sometimes it really feels like it's not there :P

I remember times when we had no such thing. Hard to imagine now. Anyway, it does make the situation when you have multiple occurrences of the same card less probable, but not impossible.

I recall threads where people were declaring that any specific card was bugged in that it always drew itself. Even with some Uncommon ones. Wackiness.