Assuming youre going out of your way to cast a lot of those spells, or even if youre just running a few bits of interaction and some card draw spells, youll have a lot of flying Creatures very quickly
Now the only way an opponent could evade infect damage would be to always have a chunk blocker ready, exile Plague Myr, or enchant it with a Pacifism-type aura to prevent it from attacking and blocking
Depending on what they choose, defending players can't use creatures of the chosen quality to block
Looking back, drawing three cards for 4 mana at instant speed would be kind of broken
Cecil, Dark Knight is the latest in aggressive black creatures and is so aggressively pushed, we might have a long term staple
The nice thing with Maze of Ith is that you can use it to untap your own creatures, like those with an attack trigger, so you can get whatever activation you want and keep your creature out of harms way