Use "Dark Necrofear" in conjunction with "Skill Drain" and graveyard effect fiends like "Dark Mimic LV3", "Sangan", and "Newdoria" to negate your opponent's effects, while retaining all of yours.
This card works well with "Doom Shaman" if you special summon it properly first, and as long as "Doom Shaman" is on the field, you can recycle Dark Necrofear.
"Dark Grepher" can quickly fill the Graveyard with Fiends to Special Summon "Dark Necrofear"".
If your opponent tries to steal "Dark Necrofear" with cards like "Brain Control" or "Change of Heart" to Tribute it and avoid activating its monster stealing effect, you can offer "Dark Necrofear" to "Deck Devastation Virus" to frustrate your opponent's plans, see your opponent's hand and maybe destroy a monster or two in the process.
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