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Effects that trigger whenever you draw a card and/or punish your opponents for drawing cards, like Sheoldred, the Apocalypse, only trigger for effects that literally say draw in their description
Ill try my best to explain required understanding, but know that Arena does a great job of holding your hand until you feel comfortable with the system
Clever Concealment will allow you to phase out as many nonland permanents as you like, provided they can be targeted by the spell
On the other hand for Standard I could see this becoming a bit of a menace between the abilities, the value, and the token
Being able to finish off the game with what is essentially direct poison damage after the Infect creatures are dealt by opposing removal and sweepers with is a new and potentially powerful line of attack for the archetype, and this doesnt even include the fringe combo potential