With 21 other legendary spells, and Zack being replayed frequently, shell draw you cards all the time
If a permanent enters the battlefield under an opponent's control with hexproof or indestructible after Shadowspear's second ability resolves, it won't lose that ability unless you activate Shadowspear's second ability again
In the Magic lore, Talion, the Kindly Lord put into motion the Wicked Slumber to stop the Phyrexian invasion, with mixed results, then had Kellan and Ruby do their dirty work to stop Agatha, Eriette, and Hylda, so the has a lot of power and influence and wields it indiscriminately vibe is fitting here: Talions our Oberon
First it showed us nearly all the upcoming 30th anniversary cards to be released in expansions over the next year
Stern Constable: limited, and a heavy cost unless you are in the white/black graveyard matters constructed deck
You could also form a more permanent alliance with another player, and funnel them the tools they need to take out the opposition so you can duel it out for 1st and 2nd