Combos Utilizing Goblin-Trenches

first put beast of burden, and goblin trenches. then use beastial fury and sack all your lands to make little people.

try 4 mana, you can have two 1/1 goblins.

tap most of your lands for two mana and sac them at the end of your opponents turn. then you have threshold and your goblins become 3/3's to attack with! you can use new frontiers for lots of mana!

the wake makes it so you can tap one land to sacrifice it instead of tapping two and the goblins you make will provide you with life from congregate as well as giving you a good attack force.>

Use a Genju to turn a land into a creature, send it to its death, then double your creature economy by sacrificing it to the Trenches.

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play trenches and crusade, followed up with a lot of sacrificing. the trenches also work great with fervent charge and/or deadapult and lord of the undead.

have goblin king, trenches in play then have coa in then make your oppent have a mountain with mystic compass.

sack all your lands to the trenches except a white and something else and then bring them all back with planar birth

figure it out yo self