Cayde-6, Vanguard Martyr

First Strike, Haste.
When Cayde-6, Vanguard Martyr dies, reveal
the top 7 cards of your library, you may reveal
any number of guardian creatures from among
them and cast them without paying their mana
costs, creatures cast this way enter the battlefield
with an additional +1/+1 counter on them.
"Pssst, take me with you."