Return this card from your Graveyard to your hand with "Dark Eruption" or "Recurring Nightmare". If you use "Recurring Nightmare", you can also return a level 5 or higher "Steelswarm" monster to your hand and Special Summon "Cell" as Tribute for it.
A great card combo is to have this in your hand, only "Steelswarm Girastag" on the field, and "Infestation Wave" on the field. Use "Infestation Wave" to return "Girastag" to your hand, and take out one of your opponents cards. Then, Special Summon "Steelswarm Cell" from your hand. Then tribute it for "Girastag" to take out another card and gain 1000 Life Points.