Sliver Queen + Sword of the Meek + Krark-Clan Ironworks
Sliver Queen
Sword of the Meek
Krark-Clan Ironworks
Infinite creature tokensInfinite creature ETB
How it works
Activate Krark-Clan Ironworks by sacrificing Sword of the Meek, adding CC.
Activate Sliver Queen by paying 2, creating a 1/1 Sliver creature token.
The Sliver token enters the battlefield, triggering Sword of the Meek, returning Sword of the Meek from your graveyard to the battlefield and attaching itself to the Sliver token.