Thrumming Hivepool (Extended Art) [Edge of Eternities]

Cost: 6 Affinity for Slivers (This spell costs 1 less to cast for each Sliver you control.)
Slivers you control have double strike and haste.
At the beginning of your upkeep, create two 1/1 colorless Sliver creature tokens. "I'll never escape this rock, but I fear they will." —Decrypted log 4.11