1R: Fangblade Brigand gets +1/+0 and gains first strike until end of turn.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)
----------------------
Fangblade Eviscerator
1R: Fangblade Eviscerator gets +1/+0 and gains first strike until end of turn.
4R: Creatures you control get +2/+0 until end of turn.
Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
{1}: This creature gets +1/+0 and gains first strike until end of turn. Daybound (If a player casts no spells during their own turn, it becomes night next turn.)
{1}: This creature gets +1/+0 and gains first strike until end of turn. {4}: Creatures you control get +2/+0 until end of turn. Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
: This creature gets +1/+0 and gains first strike until end of turn.