Trazyn the Infinite

Hexproof
This spell can't be countered.
Trazyn the Infinite can't be blocked.
You have no maximum hand size.
{6},{t}: Exile another target creature or artifact
until Trazyn leaves the battlefield. You may cast
that card for as long as it remains exiled, and
you may spend mana as though it were mana
of any type to cast that spell.
I welcome all... to a place in my carefully curated collection.