Kenta Harane's Jeskai But James Dimitrov was no pushover
(5/3/2019) A noncreature permanent that turns into a creature can attack, and its abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn
With Gleeful Demolition joining the fray going all-in on an artifact build of 8 Whack with things like Memnite and Ornithopter to sacrifice could make sense
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It also nullifies your opponent's graveyard - pretty backbreaking for strategies like 'Dredge' that rely on the 'yard - and allows you to grab your opponent's best threat from the void and play it free of charge (Okay, at the cost of its own life, but it's a lowly two-drop, so who cares?) Paired with targeted discard cards like the popular Thoughtseize, Dauthi Voidwalker has the potential to be super scary
The cards old wording allowed for some leniency in a way that you could get away with playing the card and responding to the sacrifice trigger by tapping it for mana