Activate Lightning Greaves's equip ability by paying {0}, targeting a creature you control.
The creature triggers, causing you to reveal the top card of your library and put it onto the battlefield if it's a land card, or put it into your hand otherwise.
If a land was put onto the battlefield, each Scute Swarm you control triggers, creating either that many 1/1 Insect creature tokens or that many token copies of Scute Swarm.
Resolve the equip ability from step 1.
Repeat as able.

Near-infinite ETB

Near-infinite creature tokens

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