That does require you to have access to both extra mana to cast multiple spells in a turn as well as lots of card draw to keep your hand full at all times
If the Army you control leaves the battlefield with another amass spell or ability on the stack, it simply creates a new Army token
But you'll face most of the time your opposing decks, you can win a few times, when players are bad or your carddraw is just insane: you'll draw answer after answer for everything your opponent plays, but you just have to play ok or with minor mistakes
1 Fierce Empath
For only three mana, she has a simple, powerful ability, which is you may play two additional lands on each of your turns
People order the MEGA for moments that deserve a bigger canvas: a milestone year, a personal achievement, a fan tribute, an exceptional photo that loses too much detail at standard card size