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That's not difficult, but it's not effective with the usual 1/1 fodder you'd have lying around

(Preferably with cheap CMC's.) Some great defensive creatures I've found are: Beloved Chaplain , Commander Eesha , Crypt Sliver , Darksteel Myr , Dawn Elemental , Deepwood Ghoul , Degavolver , Dragon's Eye Savants , Dream Fighter , Everdawn Champion , Giant Ox , Mischievous Poltergeist , Mistmeadow Skulk , Mother of Runes , Phantom Nantuko , Predator Ooze , Seraph of the Sword , Serendib Sorcerer , Serene Master , Sorceress Queen

#15 Ionos Kilowattrel Illustration Rare You absolutely gotta love it when favorite trainers appear in Chibi style on rare Pokemon cards

Coiling Oracle If you want cheap creatures with good enters abilities to flicker, copy, or bounce, Coiling Oracle should be near the top of the list

Enchantment - Aura Color tag templates(None) Saheeli, Sublime Artificer Whenever you cast a noncreature spell, create a 1/1 colorless Servo artifact creature token

They are a full art, textured card featuring a silvery rainbow coloured pattern, hence the name rainbow rare