Its no secret that taking an extra turn is one of the most powerful things you can do in Magic
(At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) The Set Design team experimented with using echo on the card (a mechanic from the Urza's Saga block)
Exxaxl: Shhh no white article spoilers, I still have the colorless one to write first
In more competitive 60-card formats, choosing one or two is a safe bet because even if Tallion is removed, youll draw a card
Adventures return but on lands, so you can play the sorcery side, and then play a tapped land for turn
The major issue with Sower is that you can kill it easily, thus getting your stuff back