Commander's Authority [Avacyn Restored] Sphinx how could I know they'd

how could I know they'd explode

Set: Journey into Nyx Type: Creature — Cat Warrior Rarity: Common Cost: {1}{W} After the Battle of Pharagax Bridge

Even the greatest hero begins with nothing

Then put all cards revealed this way that weren't put onto the battlefield on the bottom of your library in a random order

Set: Battlebond Type: Creature — Human Rarity: Common Cost: {1}{B} When Doomed Dissenter dies

Commander's Authority [Avacyn Restored] Sphinx how could I know they'dSet: Avacyn Restored Type: Enchantment Aura Rarity: Uncommon Cost: {4}{W} Enchant creature Enchanted creature has "At the beginning of your upkeep, create a 1 1 white Human creature token." "Wear her symbol with honor, a sign of faith upheld and honest deeds bravely done."