Luckily, Frenetic Sliver can potentially protect your slivers from both
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Other than the obvious benefit of this protecting your spells from hand disruption like Thoughtseize and Duress, foretell costs often make a card cheaper to cast as well
Talion, the Kindly Lord Talion, the Kindly Lord accrues immense card advantage and even a little pressure, presuming you get the number right
In addition to the cards Constructed appeal, Summon: Knights of Round is also a solid addition to any Saga Commander deck, such as those built around Tom Bombadil
The rules team shot it down