Ive got an MTG deckbuilding guide right here that breaks it down into an easy, step-by-step process
but if I try to put these in order, chances are good they'll just go all wibbly-wobbly on me, so let's just get on with it
If you are instructed to cast a spell with overload "without paying its mana cost," you can't choose to pay its overload cost instead
Supporting both attacking and defending, when Mirri becomes tapped and attacking, your opponents can only block with one creature, putting them in a bind
A pattern of cards has popped up in red cards that let you take a creature from your hand and put it on the battlefield, getting around casting costs and counterspells, though they generally have the trade-off of having to sacrifice that creature at the end of the turn
You can't bring your own fire extinguishers