Getting an immediate 4/4 Lifelink with Vigilance for is already strong, but what really pushes Batterskull over the top is how difficult it is to answer cleanly
is a Split Second piece of removal that can take care of any creature, but can occasionally deal with multiple creatures without being responded to
If your deck does not have access to green, you might have to get more creative by using cards like Tithe, Pilgrims Eye, or even Demonic Tutor to put lands into your hand, cards like Mana Geyser, High Tide, or Caged Sun to get a big payoff, or mana rocks like Arcane Signet, Coalition Relic, and the Ravnica Signet cycle (Boros Signet, Izzet Signet, etc.) to speed things along at the risk of seeing them destroyed later
4, costing $39.99 in non-foil and $49.99 in foil with a limited print run.
This week Im returning to my Top 20 series, this time featuring our newest set, Aether Revolt