Sure, if you lose the flip, you're basically down a permanent, but you can circumvent that a bit by weaving this into a deck that actively wants to sacrifice permanents
I present to you the top 10 Best Budget Cards of all time
Sliver Swarm - Commander Masters Sliver Swarm, as the name suggests, is a deck thats all about Slivers , a creature type thats relatively minor on its own but buffs every other ally with the same type
Elspeth, Storm Slayer Elspeth, Storm Slayer gets dropped into a Standard that's hostile to her mana value, but I think she might be good enough to see play anyway, Her abilities are great and work well together, but there are a ton of tools readily available in Standard that will work well with those abilities
(And shout out to my local shop, the always great Twenty Sided Store in Brooklyn, New York.) You can find the full deck lists for Unsanctioned below -- new cards are bolded