Quicker to resolve than SP/Spy, but arguably dumber, because it was literally the same as having none of them.
In before edge case
Actual edge case for why repeatedly playing and topdecking Schemes is different from not having them at all (note that using Scheme to topdeck another card is not an edge case, because that is its actual purpose):
- use them to lower the price of Peddler
- use them to activate Conspirators
- bump up the value of HoP
- Scheme is the bane for YW
- a Scheme in hand takes up space and helps you activate Menagerie (e.g. if not having that Scheme would have meant having a duplicate in hand)
- fodder for TfBs
Some of these examples can only explain the topdecking of a single Scheme -- for example, it would be ridiculous to topdeck more than 1 Scheme when it is the bane. One is enough! But never fear, there is an edge case to this edge case -- Minion attacks. If you only top deck a single Scheme, Minion will remove your protection! But if you topdeck six Schemes, you are protected for at least that turn.