Art needs to be cropped to center image

To be honest, I'd think a reminder that mana drains outside of combat may be a more necessary reminder text. But I get the problem. One is players not knowing how the card works. The other is a rules quirk that many players don't know.

Oh, hey, here's something I don't know off the top of my head. Can you cast spells in combat if you don't attack with any creatures? Is there still a gap before combat opens and creatures are potentially assigned as attackers? Because I'm pretty sure that if no attackers are declared, the combat step immediately closes with no chance to respond... but again, I'm not sure. I'm sure the MTGO players know, though.

You can always cast spells during combat, even if no attackers are declared. Note that if no attackers are declared, the declare blockers step and combat damage steps are skipped, however the declare attackers step and the combat phase is never just skipped. (unless specified by an effect of a card of course) Players would be able to have priority during the beginning of combat step at the very least to take advantage of the ability.