Once you begin to cast a spell, losing control of Muldrotha won't affect the spell
The ultimate top-end for any green EDH deck, this enormous beast turns 13 this year, which apparently officially makes it eligible for a retro-frame border
Many are difficult to play in Commander because they are multi-colored and their effects simply aren't big or flashy enough for the format, and even the Vorthos / flavor / design people I know generally dislike them before of their ample border and very small art
I think the overall power level is pretty weak, but the face commander cheats on commander tax and offers enough trickery and convoke shenanigans to catch players off guard
The decks span four of the most popular archetypes: Slivers, Eldrazi, Enchantress and Superfriends
One copy has sold for around $150 on TCGPlayer , but the current listings start at around $184.99