Shocker, Unshakable

Six mana buys a 5/5 body plus a Char-sized burst split between a creature and its controller, so he trades up on arrival and chips two off a life total before he ever attacks. That reach-to-the-face clause is what separates the effect from ordinary enters-the-battlefield removal; the damage does not just clear a blocker, it advances the clock. The first strike is the part that reads modestly and plays sharply. Restricting it to your own turn hands the aggressor the tempo without gifting him a defensive fortress: on offense he wins combat before the blocker swings back, but on the opponent's turn he blocks as a plain 5/5, so a 5/5 attacker still trades through him rather than dying for free. It is a deliberately asymmetric keyword, tuned to reward pushing damage rather than sitting back, and it keeps a six-drop from becoming an unassailable wall. Everything about the design points one direction: come down late enough to matter, kill something, poke the face, then attack into first strike the following turn. He is a top-end beater that pays part of his cost back the moment he lands.