Kayn, the Shadow Reaper

When Kayn enters the battlefield, choose one --
- Kayn gains haste and the ability "Whenever
Kayn attacks or blocks it gains +X/+0 until end
of turn where X is half its power rounded down." and gains the Assassin subtype.
- Kayn gains lifelink and the ability "Whenever Kayn attacks or blocks it gains +0/+X until end
of turn where X is half its power rounded down." and gains the Demon subtype.