msem-instigator

When Chamber of Reflections enters, draw a card, then choose a legendary card name.
Permanents you control with the chosen name have hexproof and the “legend rule” doesn't apply to them.

As an additional cost to cast this spell, sacrifice a permanent.
Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

As Guiding Light enters, choose a color.
You have hexproof from the chosen color.
If a creature you control would be dealt damage by a source of the chosen color, prevent 1 of that damage.

Lifelink
Whenever Infectious Ego enters or attacks, exile the top card of target opponent's library. If it's a land card, that player gets a poison counter. You may play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.

{T}: Add one mana of any color.

Flash
Flying
When Powder Scatterer enters, exile target noncreature spell. Its controller draws a card.