In the past I have heard that this is an unfair advantage on turn one and that some Commander errata should be done to change the criteria on cards like this or Felidar Sovereign, but I am inclined to disagree on the basis that in a multiplayer game the advantage is pretty mitigated to the point where the Ascendant only makes you die slower and the Sovereign is good but often answered by someone at the table
Yes, you need a deck that can reliably provide evasive creatures to enchant, and that creature is probably going to die within the next 3 turns or so, and by enchanting it you're adding extra incentive for your opponents to kill it, but all those risks are worth the payoff of drawing more than 1 card for just 1 mana
Some picks here will shake up tables
There are battlefield states you can back yourself into which keep you from being able to do anything for turns on end
Venusaur will run you from about $6500 in the worst condition up to the absolutely crazy pricing of $7500
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