As far as strategy goes if you are using more than one Espeon in your deck or another Eevee-evolution in your deck it would only make sense to have Espeon in your deck so that that other Eevee evolution would have 20 more hp
Ovika triggers off anything noncreature, and a huge number of the tokens wincons in that deck are already enchantments, like Impact Tremors, Goblin Bombardment, City on Fire, Purphoros, God of the Forge, Sorcerer Class, Shared Animosity, Shark Typhoon, Sunbird's Invocation, Fiery Inscription, Mana Echoes, Cavalcade of Calamity, plus a dozen more, so perhaps just lean in
Charge of the Mites Goliath Hatchery Infested Fleshcutter Kinzu of the Bleak Coven Lukka, Bound to Ruin Mirrex Ria Ivor, Bane of Bladehold Skrelv's Hive Viral Spawning White Sun's Twilight Wurmquake There are three different tokens with toxic 1 that can be created by various cards: the 1/1 Phyrexian Mite token, the 3/3 Phyrexian Beast token, and the */* Phyrexian Wurm token with toxic 1
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But I'm going to toy with that idea, sounds fun