The lesson here is that consistent is not synonymous with better. Slightly increasing the consistency of certain draws in his deck may have been better, but he would have drawn at least one card less consistently, and without knowing that was the correct direction to take the deck, it was more responsible to keep the deck with 61 cards in it
Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke
Legacy staples like Ancient Tomb and City of Traitors are not Modern legal
Its simplicity allows it to consistently deal high damage without the drawbacks of energy discard or complex evolutions
If multiple creatures with lifelink you control deal combat damage at the same time, the damage dealt by each of those creatures is a separate life-gaining event and Starscape Cleric's ability will trigger that many times
1 Hero's Downfall