Sirius, All-Knowing Mystery

Indestructible, Starbound (This creature can block creatures with flying and starflight).
You have hexproof.
Phenomenon— Once per turn, flip a coin. If
heads, spells in your graveyard have Flashback
where its flashback cost is it's converted mana
cost.
{t}: add two many of any one color to your mana
pool.