What exactly are the number of champion runes allowed in a single deck? e.g. hammerstrike max limit is 2 runes in a deck but i saw a player called 4 dwarven kings to play. Are there differences in maximum allowable number of runes for champions or spells in a deck or something?
The max amount of any givien rune is 2. Unless they have Multitude wich allows them to be includedx3 instead. If you saw someone with more than that in play it is either the result of a spell like grimlich Mirror or an ability that lets the King be copied
The most common this day is mirror trap I think. Simple 40 or so cost spell that lets you make a mirror copy of your unit. Where as grimlics mirror used to let you make a copy of theirs as well.
