Mistford River Turtle 

Creature — Turtle
$0.18 #17869 0.56 6.9 years
Whenever this creature attacks, another target attacking non-Human creature can't be blocked this turn.
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Cards similar to Mistford River Turtle expected a card that isn't here?
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"Whenever this creature attacks, another target attacking creature can't be blocked this turn."
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"Whenever this creature attacks or blocks, if you control another non-Human creature, this creature gets +1/+1 until end of turn."
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"Whenever this creature attacks, put a +1/+1 counter on it and a +1/+1 counter on up to one other target attacking creature. That creature can't be blocked this turn."
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"Whenever this card attacks, another target legendary creature can't be blocked this turn."
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"
: Target creature can't be blocked this turn. Activate only during your turn, before attackers are declared."
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"Whenever this creature attacks, you may tap an untapped non-Human creature you control. If you do, this creature gets +1/+1 and gains trample until end of turn."