The combination of a growing threat and card draw is just nasty
One of the most recognizable cards in the world
Add these auras: Mantle of the Ancients single best aura, mass recursion and wincon Glasswing Grace flexible land, gives evasion and lifelink, better on your own creature though otherwise opponent will gain life Kaya's Ghostform, Timely Ward, additional protection especially for our commander Ethereal Armor, All That Glitters, Twinblade Blessing turn any evasive creature into a game-ender once we have a critical mass of enchantments Grievous Wound is nasty, kills anyone in a hurry, especially good against Lifegain decks Eye of Nidhogg and Spirit Loop are great to slap on opponents' creatures, Loop is worded in a way that YOU (the owner of the aura) gain the life, not the enchanted creature's controller Minimus Containment, Reprobation, removal in aura form
Creatures you control gain menace (This creature can't be blocked except by two or more creatures.) and trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) until end of turn
I find the last ability to be the best, as you basically get a free construct each turn that just keeps on growing