Replacing itself just isnt enough these days, it needs to actuallydo something too, and this just wont This is utterly unbeatable on turn two, and no matter when you draw it, it represents a significant threat that will allow you to really snowball your advantage
For example, a card that allows a player to win the game instantly would be in a ban
It also works well with small mass damage spells like End the Festivities, basically making it a Plague Wind
We've got a few Lands which do other things, like Rogue's Passage (which gets our Equipped Creature through), Castle Ardenvale (which makes more Creatures), Emeria, the Sky Ruin (which buys back our dead stuff), and Maze of Ith, which can save us from a certain death
You never know what cards you'll draw or what chaos your opponent will unleash
Felidar Guardian: Flicker help