Incorrect rules interaction
Craterhoof Bohemoth did not trigger all creatures have haste. When the card entered all creatures gained +x/+x but only one creature was able to attack.
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JLand#61241
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Rezzahan#77802
commented
Craterhoof Behemoth's trigger does not give haste, only trample and +X/+X. It itself HAS haste, but all your summoning sick creatures do not gain that ability from the trigger.
"When this creature enters, creatures you control gain trample and get +X/+X ..."