Join Shields [Mystery Booster] Standard Boast — {1}{B}

Boast — {1}{B}

It is less than that

Whenever Thundering Raiju attacks

and/or graveyard for a Rune card and put it onto the battlefield attached to Runed Crown

Only time will tell what heights it may reach

Join Shields [Mystery Booster] Standard Boast — {1}{B}Set: Mystery Booster Type: Instant Rarity: Uncommon Cost: {3}{G}{W} Untap all creatures you control. They gain hexproof and indestructible until end of turn. (They can't be the targets of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy them.) "We are the shield that never breaks, the bough that never burns, the song that can never be silenced."