It's heavily played at the kitchen table and Commander, and over at EDHREC.com it's in 33,969 decks for 16% of decks with its colors
Alternatively, Ghoulcaller Gisa is the thirteenth most popular mono black commander, with just under 400 decks currently
Hedron Crab A classic staple of Modern mill strategies, Hedron Crab turns every land drop into some milled cards
Whenever you cast an instant or sorcery spell, Storm Skreelix gets +2/+0 until end of turn
Offering more robust stats than Daring Visitor, Empowered Sibling would need a higher damage investment to take out if direct board removal is not available
I learned from Ross Merriam that you dont need to play underpowered cards to get maximum value out of Crested Sunmare and that it can simply fit into various midrange strategies just fine