Above is a helpful image of the graph that Wizards of the Coast has on its website showing the ideal mana curve
Brawl Not Legal Vintage Banned Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Banned Penny Not Legal Sentinel Dispatch Conspiracy (Start the game with this conspiracy face up in the command zone.) At the beginning of the first upkeep, create a 1/1 colorless Construct artifact creature token with defender
But since you have two shots, it can be very annoying to shut down completely
In a format with fetchlands and cheap interaction, which is the foundation of Modern and Legacy, theres probably no safe Delve, but Im glad Wizards tested the boundaries with Treasure Cruise
Typically, sources of red card draw will either come with the downside of forcing you to discard cards from your hand, or by exiling cards from the top of your library instead and only allowing you one or two turns to cast them
It used to be a staple card that enabled several strategies at the tournament table