To prevent this, use Divine Wrath, Effect Veiler, Forbidden Chalice or similar (do NOT use Skill Drain, as it will prevent "Morphing Jar #2" from using its effect).
For example, if you control Opalescence, which says, in part, "Each other non-Aura enchantment is a creature," each enchantment will be a creature at the time it enters the battlefield and will not cause triggered abilities to trigger
Its best if that one was left out for some players sanity
The sky is the limit
In fact, the block fleshed out mechanical identities of many beloved creature types in Magic , including Zombies, Goblins, Soldiers, Elves, and more
Vanguard Cards I want to briefly discuss the Vanguard cards