Few more questions on mechanics in translation to the rp.

How would Card draw come into effect if at all? Same with Taking extra turn cards. I guess the latter could be seen as counting up by one on the spell count and casting all over again. (though that adds the question of how broken certain cards will be like the power nine's Time walk) 

Furthermore, how would mass board wipe spells come into play? I'll use [url=http://gatherer.wizards.com/Handlers/Image.ashx?multiverseid=247383&type=card]Selesyna[/url] as an example. They are certainly not targetable and could hit allies very often (probably even other players.) 

Finally how would creature summons work, would they be mindless thralls or effectively mana constructs. (All angels are comprised of white mana after all)