Somewhere around 120-150 per day. And some more from each defeated opponent. If you do not spend topaz, then in 3-5 days you will be able to defeat 23-25 enemies and that's it. This will give you 95-120 tokens, for which you can buy either a cheap artifact or several cards in the store. At the same time, the remaining two weeks of events will not help you in any way. Even if you buy boosters for all the snowballs, the most you can do is get a small chance to kill another opponent (say, if you are very lucky with the crits), which will give you another dozen tokens for which you can buy... fertilizer :)
Actually, everything :)