Again this is dependent on the colour or guild you choose to play, but the standard mana curve is a great guideline for getting started
There are some niggles here with trigger ordering that I haven't investigated fully, but so far my informal play procedures have been sufficient for a few quick playtest games.
This is the classic example of a set that was undervalued at release and has appreciated significantly
I want to stress one more time that primary, secondary, and tertiary are relative to how often an effect is used
If Opportunistic Dragon leaves the battlefield before its triggered ability resolves, your opponent keeps control of their Human or artifact, it doesn't lose any abilities, and it can still attack or block as normal
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