A Troublesome Pair

Whenever you attack with both a creature named Rathian
and a creature named Rathalos, put a quest counter on A
Troublesome Pair.

Remove two quest counters from A Troublesome Pair and
sacrifice it: Deal 10 damage divided as you choose, among
any number of targets. For each creature that dies this turn
due to this damage, its owner gets a poison counter.

Queen of the earth and king of the skies,
the quintessential wyverns, rulers among their kind.