Sliver all night long

Wincons
Sliver Queen + Lavabelly Sliver + Basal Sliver / Ashnod's Altar
Sliver Queen + Purphoros, God of the Forge + Basal Sliver / Ashnod's Altar
Sliver Queen + Basal Sliver / Ashnod's Altar + Training Grounds = infinite Slivers + Infintie colorless mana infinite and ETB effects
Spiteful Sliver + Blasphemous Act ( If Sliver Hivelord in play none of our Slivers die ) = Damage dependant on numbers of slivers in play

Fun interactions
Sliver Overlord + Training grounds = 1 colorless creature tutor
Sliver Overlord + Amoeboid Changeling = Steal other opponents creatures ( Does not work with Crystalline Sliver in play)
Sliver Overlord + Training grounds + Amoeboid Changeling = Steal a creature for 1 mana ( Does not work with Crystalline Sliver in play)

Quick Sliver + Seedborn Muse = play slivers every turn

Frenetic Sliver + Dregscape Sliver = Unearth a Sliver then a 50% chance to keep it from being exiled at the end of turn
Frenetic Sliver 50% chance to trigger ETBs and save slivers from board wipes
Frenetic Sliver + Living Death = keep all Slivers in play aswell as returning all Slivers in graveyard to play

Hollowhead Sliver + Terminus on other peoples turn as a desperate way to find a "board wipe"

Firewake Sliver for the haste + pumping slivers for extra dmg / as a sacrifice outlet in response to casting Living Death

Blind Obedience for lifegain / easier time getting attacks in for card draw of Synapse Sliver if opponents creatures enter tapped

Urza's Incubator + Morophon, the Boundless = almost all Slivers free to cast
Morophon, the Boundless + the first sliver + Hibernation sliver, pay 2 life to return first sliver to hand and play for free cascading + if you have quicksliver in play do it all in instant speed to dodge spells/boardwipes by cascading till ya hit what ya want