Then put X +1/+1 counters on Siegfried, where X is twice the number of creature cards in your graveyard.
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(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Illustrated by Anthony Palumbo Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
Some stores have a trade-in policy for store credit, which can be beneficial if you're looking for other cards
This effectively gives you an extra draw , and it also pairs well with any cards that toy with playing cards from anywhere other than your hand (like Laelia, the Blade Reforged)
It offers a free turn for you to draw into the cards you need while still yielding zero Prizes to your opponent when Robo Substitute is Knocked Out