Enchantment
When ~this~ is exiled, clash with an opponent. If you win, destroy all creatures with flying
When ~this~ is put into a graveyard from the battlefield, you may pay 1WUBRG. If you don't, you reveal the top five cards of your library. you put all creature cards from among them into hand, and put the rest on the bottom of your library in any order
Tap an untapped Dryad you control, Tap an untapped permanent you control: two target permanents gain ''Sacrifice ~this~: put a 2/2 green Elf creature token onto the battlefield'' until end of turn and tap those permanents

Converted mana cost: 1

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AlexChurchill/TypeFourEnchantmentGenerator