You will need some shuffle, mill and/or scry effects to take full advantage of the Library but most combo orientated decks should be able to manage that
That said, if playing against combo decks that can win very quickly isn't something you find fun I could see this card being a pain to play against
Teferis Protection takes the cake here, though, as its easily the best in slot
You have basically assembled a combo that is Boros Charm to the opponents face every turn for the foreseeable future
Reach, Lifelink, and First Strike make it pretty much impossible to profitably attack into
Ill be playing in drafts every Friday, will be working the cards into decks in Standard, Pioneer, Commander and Modern, and Ill be keeping an eye on the Magic The Gathering competitive metagame to see how these cards effect the most popular trading card game on the planet