With 300 damage on its ultimate attack, it could knock out almost anything
Without Bargain, Torch the Tower is passable as a Shock spell, but if the player has spare Bargain fodder from Celebration-oriented cards like Hopeful Vigil or various Roles, then Torch the Tower becomes a better Lightning Bolt, which is saying a lot and lets the card scale up a bit in the mid-game
For Invasion of Alara's triggered ability, if you exile two nonland cards with mana value 4 or less, but you don't cast one of them, the one you don't put into your hand will remain in exile
Considering how flexible it is as a removal spell, you could even say that its absence from most decks is unexpected
Legality depends on the tournament format -- Copy Token can be legal in some formats and banned or restricted in others
Invoke Despair Our highest scoring of the "Invoke" cycle is the Black one