Thaddeus, Purveyor of Secrets

Hexproof
{u}{u}: Rules Librarian- Copy or counter
an activated ability that was just activated.
{u/b}{u/b}{u/b}: Access the Token Library- Create a
copy of any token on the battlefield.
{b}{b}: Summon Ophelia- Create a Black Legendary 0/4 Creature Dog Wall token.