The Core only works if there is a high chance to hit a Princess as the top card of your Deck thus you should aim to have as many as possible
In Commander, in particular, it plays well in a Rakdos (red/black) Aristocrats shell, where creating and sacrificing tokens happens constantly
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If not these are a liability
While there are stronger haste-enabling Slivers, Blur Sliver does deliver this fun Sliver-themed infinite combo: 4
However, the synergies that this deck presents are so numerous that it's a lot more difficult than answering a single spell or card in order to beat it