pokemon base cards - Clefairy (6) - Set 2 Common Card Type Base Set - Expansions |

This is mainly due to its exclusivity

Abomination of Gudul Abzan Guide Ainok Tracker Akroma, Angel of Fury Aphetto Alchemist Aphetto Exterminator Aquamorph Entity Ascending Aven Ashcloud Phoenix Aven Liberator Backslide Bane of the Living Battering Craghorn Birchlore Rangers Blistering Firecat Bloodstoke Howler Boneknitter Branchsnap Lorian Brine Elemental Broodhatch Nantuko Cabal Executioner Canyon Lurkers Charging Slateback Chromeshell Crab Coral Trickster Crude Rampart Daru Healer Daru Lancer Daru Mender Daru Sanctifier Dawning Purist Defender of the Order Dermoplasm Disruptive Pitmage Dragon's Eye Savants Dulcet Sirens Dwarven Blastminer Ebonblade Reaper Echo Tracer Efreet Weaponmaster Exalted Angel Exiled Doomsayer Fallen Cleric Fathom Seer Fledgling Mawcor Foothill Guide Fortune Thief Frontline Strategist Gathan Raiders Gift of Doom Glacial Stalker Goblin Taskmaster Gravel Slinger Grim Haruspex Grinning Demon Haunted Cadaver Headhunter Hooded Hydra Horde Ambusher Hystrodon Icefeather Aven Imperial Hellkite Infernal Caretaker Ironfist Crusher Jeering Instigator Karona's Zealot Kheru Spellsnatcher Kin-Tree Warden Krosan Cloudscraper Krosan Colossus Krumar Bond-Kin Liege of the Axe

Now though there are more ways to attack with defenders

What Happens When You Clone a Clone