Lake Ilinata Standing Stones

Lake Ilinata Standing Stones enters the battlefield tapped.
{t}: Choose mana to add until this is untapped
1 {g}: All Archers have First Strike, Vigilance
2 {u}: All Mages have Flash, Spells cost -1
3 {r}: All Warriors have Haste, Vigilance
4 {w}: Legendary Creatures have Hexproof
5 {b}: All Rogues have Shroud, Vigilance
The mystical stones offered the visitors a choice, which revealed the indiidual's goals.