Bosnia

{t}: Add {g} or {w}.
{t}: Give target opponent a landmine artifact token with "When you cast a creature spell sacrifice landmine and landmine deals 2 damage
to you."
{1}, {t}: Create a 0/1 white goat creature token.
{5}{g}{w}, {t}: Goat creatures you control get
+X/+X and trample until end of turn,
where X is the total number of in play.