{3}{U}{U}: Until end of turn, Thopters you control have base power and toughness X/X, where X is the number of cards in your hand.
{2}{U}, {T}: Draw a card, then discard a card. If the discarded card was an artifact card, exile it from your graveyard. If you do, create a token that's a copy of it, except it's a 0/2 Thopter artifact creature with flying in addition to its other types.
3/3
Legalities
tlrlegal
duellegal
brawlnot legal
pennylegal
PreDH
Rulings · 5
wotc
Except for the listed exceptions, the token copies exactly what was printed on the discarded card and nothing else.
wotc
The token is a Thopter artifact creature in addition to its other types. Its power and toughness are 0/2, and it has flying. These are copiable values of the token that other effects may copy.
wotc
If the copied card has {X} in its mana cost, X is 0.
Notes
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Any enters-the-battlefield abilities of the copied card will trigger when the token enters the battlefield. Any “as [this artifact]” enters the battlefield or “[this artifact] enters the battlefield with” abilities of the copied card will also work.
wotc
The value of X is determined only as Leonardo’s first ability resolves. Once that happens, the value of X won’t change later in the turn even if the number of cards in your hand changes.