Illustrated by Hori Airi Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Legal Comp
Eldrazi Mimic This one looked pretty innocuous when it was first spoiled, but it quite quickly became a key part of one of the most notoriously busted decks to ever hit the Modern format
There's tons of examples like this, Vault of the Archangel, Pontiff of Blight, Eight-and-a-half-Tails, Starlit Sanctum
Sadly, were hard up for creatures with power 4 or greater that we can play for 3 or less mana in Standard
They read, Whenever Zur the Enchanter attacks, you may search your library for an enchantment card with mana value 3 or less, put it onto the battlefield, then shuffle. That means you can find whatever answer you need whenever they attack