Sliver young are sorted into clutches according to their potential and their future role. Human scholars can only guess how those are determined.

Hive Stirrings

Create two 1/1 colorless Sliver creature tokens.

The List

Jumpstart: Historic Horizons

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Magic 2014

Put two 1/1 colorless Sliver creature tokens onto the battlefield.

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Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn’t provide any additional benefit.

If you change the creature type of a Sliver you control so it’s no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures you control.