Echo

Description
Reproduces the active effects of the last spell cast, without the Mana cost.

Strategy and Synergy
This card benefits heavily from the upgrade. If Doublecast is paired with, you can have 3 stacks occurring every second instead of just 1.

Echo copies all the upgrade effects of the copied spell as well. If used on a spell with, Echo will also be consumed. If used on a spell that has Doublecast, Echo will Doublecast potentially triggering a quadruple cast.

In decks that make heavy use of, Doublecast Echo can be used to copy and generate 6 Jams, or 12 if Railgun also had Doublecast.

Note that Echo can spells, but it cannot  them.