Yes, paying two extra mana to draw a card is worth going for if you canBlink of an Eye is the new version of Into the Roil, which was quite the spell
In Tempest, it was turn one (Mogg Fanatics, shadow creatures, and flyers), Invasion turn two (2/2 bears for every possible color combination plus several one- and two-mana apprentices and utility creatures), and Mirage turn three
For only one mana, it prevents a creature from blocking and from activating its abilities
With reprints, that number easily rises to over 30,000 cards and almost all of them are legal in Commander
In any case, you have 20 life and don't have access to the command zone
You might want to focus on removal spells (like [c]Fateful Absence[/c]), counterspells (like [c]Saw It Coming[/c]), and board clears (like [c]Doomskar[/c])