gain life draw a card mtg lifegain AND mill is so tragic what the heck Gain Life, Draw Cards, Grow

You either need to be able to empty your hand faster than your opponent can in order to actually generate card advantage (they might help with discard) by refilling both of your hands back up to parity, or you have to somehow render your opponents new cards useless after resolving it killing them is one way to do so, by the way or you can find some other way to make the Draw-7 one-sided

When it comes to colored spells, there are lots of ways to make sure they arent game-breaking

They work for the good of the community

Everything from Mono-Black to Rakdos Midrange to Esper Midrange play multiple copies of this card

Dont attack me or youll lose your board seems like a viable threat that can be played in more decks

You could certainly play a boardwipe, but that can set back your game plan as much as theirs