Tiger-Dillo {1}{R}
Creature — Cat Armadillo
This creature can't attack or block unless you control another creature with power 4 or greater.
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Cards that do something similar expected a card that isn't here?
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Relic Golem 97%
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Flowering Lumberknot 96%
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"This creature can't attack or block if an enchantment is on the battlefield."
Slumbering Dragon 81%
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"This creature can't attack or block unless it has five or more +1/+1 counters on it."