Orb of Unity, a powerful Soulseeker, etc. The cost and recoil are damaging, but worth it in the right situation. Be careful not to kill yourself accidentally, though!
Strong against: strong things, annoying things, other peoples' strategies.
Weak against: object removal, having low HP (best to place this in a healing deck with cards like Vampiric Bite to have those extra HP to spare).
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