Originally Posted by
Ninjaman
That drawback is at worst coming into play tapped, and usually only sometimes. A drawback that is usually worth playing more powerful cards.
It's not necessary to pick low-devotion cards if you have a proper mana base.
Your mana base should fit your spells, not the other way around.
Traveller's amulet is a bad card. It's much better to play a good mana base
The tempo you gained from playing a basic instead of an tapped dual, you lose twice with the amulet.
Elvish rejuvenator is a fine ramp card, but it doesn't do that much for mana fixing, at it takes until turn 4 to fix anything.