Merlin, Rabbit is the only card that allows you to draw, and while Tiana, Celebrating Princess does provide some benefit to an empty hand, the problem is that every card you draw of the top will cost less than four ink and be fairly low impact
The explosive popularity of Commander top-down sets full of real-world analogs, and multiple sets with legends matter themes have all contributed to a card pool absolutely flooded with legends, and that means just as many payoffs
Nazgul Sure, the Nazgul are uncommons, and yes, it is super flavorful to have nine of them in your deckall with different artwork to support them being the separate wraiths
Vampiric Link is very different than Lifelink, and it shows in its applications
Tap the chosen permanents you don't control