You play a certain number of counterspells in decks that want them as they are decent coverall security and disruption however Spell Snare is too limited in its targets to be a good coverall or security card
716.4: Some older creature cards, called leveler cards, have level up abilities that add level counters to them
This led to Hogaak being banned in Modern despite being designed specifically for the format.
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Abomination, Terrifying Titan Agatha of the Vile Cauldron Amarant Coral Arbalest Engineers Arlinn, Embraced by the Moon Arlinn, the Moon's Fury Ashroot Animist Atalan Jackal Atarka, World Render Blitz Hellion Boartusk Liege Boom Scholar Borborygmos Borborygmos Enraged Borys, the Spider Rider Bumi, Unleashed Cactusfolk Sureshot Charging War Boar Collision // Colossus Collision // Colossus Colossal Might Deus of Calamity Domri Rade Domri's Nodorog Domri, Chaos Bringer Domri, City Smasher Doors of Durin Dragonborn Champion Dragonlord Atarka Earth Rumble Wrestlers Etali, Primal Sickness Fanatic of Xenagos Frenzied Arynx Furious Spinesplitter Gangly Stompling Gert and Old Lace, Runaways Ghor-Clan Rampager Giant Solifuge Gladiolus Amicitia Grove Rumbler Gruul Spellbreaker Hallar, the Firefletcher Hellkite Hatchling Herald of Ilharg Hugs, Grisly Guardian Hulk, Gamma Goliath Hustle // Bustle Junkblade Bruiser Khenra Charioteer Kogla and Yidaro Mina and Denn, Wildborn Minsc & Boo, Timeless Heroes Owen Grady, Raptor Trainer Polis Crusher Proud Wildbonder Quartzwood Crasher Raggadragga, Goreguts Boss Raging Swordtooth Rampaging Geoderm Raph & Mikey, Troublemakers Ravager of the Fells Red XIII, Proud Warrior Regisaur Alpha Relentless Hunter Rhino, Barreling Brute Runes of the Deus Sarinth Greatwurm Savage Packmate Scab-Clan Mauler Scarlet Spider, Ben Reilly Scuzzback Marauders Shivan Wurm
Withengar's drawback is that it is the transformed side of the equipment, Elbrus, the Binding Blade
