You can support it with a fair game, which Hemsley did somewhat, but it can be a proactive fair game, and I think attacking your opponent from multiple angles makes it a lot harder for them to prepare for (are they trying to stop your creatures/Stoneforge or your graveyard?) Another card that I think is way too good not to see play is Dakkon, Shadow Slayer
(2022-12-08) Any cards drawn prior to Sylvan Librarys ability resolving, including in your upkeep or in response to Sylvan Librarys triggered ability, can be chosen to be put back using this effect
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Steel has some of the best removal options in the game, with its only weakness being the lack of a proper board wipe like Be Prepared
That means you can kill a creature, a planeswalker or even a player with only one mana