Myth vs
Depending on what they choose, defending players can't use creatures of the chosen quality to block
With the addition of Unholy Heat to Modern, not even Lightning Bolt has been able to fully withstand the power creep of the last few years, and I personally would place it below Unholy Heat in power level when taking into consideration the context of the Modern metagame
As other players have recognized the value in taking lands early, weve been forced away from five-colored control strategies
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
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