At Steemmonsters, there has been a new rule "Broken Arrows" for some time.
Basically I find it interesting, if there are different rules.
What I do not understand is why you can not use the Crustacean King.
The Crustacean King counts as an "Arrow" monster, but his real purpose is to fill up the front monster.
The "Arrow" attack he receives only from level 3, so why can not you use him as a level 2 monster in a "Broken Arrows" fight?
It is also possible for the monsters to fight higher level monsters with a lower level if either the Summoner only has a lower level or the League (all levels are only approved from Diamond) has a lower level limit.
Incidentally, it only affects the water team, as the Soil Team's Wood Nymph replenisher and Divine Healer of the Life Team have magic attacks unaffected by the Broken Arrows rule.