Dragon. Fi Lendicol can teleport with his allies to attack any realm. He can use any unarmed combat card and is immune to offensive cleric spells and offensive psionics.
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TSR
Wizards of the Coast
Fi Lendicol has been a bluelined Flyer in many places, but he is not a flyer. Being able to teleport with allies to attack any realm in play makes Fi Lendicol a great addition to any combat deck, especially one that uses lots of allies. Fi can also use any unarmed combat card, even those restricted to champion types other then wizards and dragons. Fi Lendicol is also immune to all offensive cleric spells, offensive psionic power cards, and the offensive psionic powers of champions.
A good example of the latter would be Davron Parscall's [PO-9] psionic death field power. Again, if you want your deck to attack, then Fi Lendicol is a prime choice. Some other good choices for an attack deck containing this champion would be the Net of Entrapment [4th-169] and the Triumvirate realms from the Underdark Set. Also consider the Scroll of 7 Leagues [3rd-412] and the Amulet of Plane Walking [BR-33]. These two items give a teleport ability similar to Fi Lendicol so you could bring many champions to attack otherwise protected realms.