Archers remind me of minotaurs pre- Theros when Didgeridoo was the only incentive to play them, and people would play really bad cards like Hurloon Minotaur
(If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.) Legendary Creature - Human Cleric Elf Rikku, Resourceful Guardian Whenever you put one or more counters on a creature, until end of turn, that creature can't be blocked by creatures your opponents control
Making a 3/3 blocker can kill a 2/3 attacker, and once you've done that once, no one will attack you again
These abilities vary widely, ranging from altering game mechanics to influencing battles
The fact that it doesnt even require black mana and that it cant be countered, discarded, or raced is just icing on the cake
There are obvious times you might want to do this (an Inevitable Defeat or Lightning Helix is about to give your opponent life) and less obvious ones