Mass of Mysteries 
Legendary Creature — Elemental
$0.29 #6678 0.00 0.6 years
First strike, vigilance, trample
At the beginning of combat on your turn, another target Elemental you control gains myriad until end of turn. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)
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"At the beginning of combat on your turn, another target creature you control gains haste and myriad until end of turn."
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"Target creature you control gains myriad until end of turn."
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"At the beginning of combat on your turn, if you control your commander, target nonlegendary creature you control gains myriad until end of turn."
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"Creatures you control have myriad."
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"Equipped creature has myriad."
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"First strike, vigilance"
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"Whenever this creature attacks, it gets +1/+0 until end of turn for each Elemental you control."