MTG Salvation

My local gameshop is having a 25 dollar budget using tcg mud price tournamate with legacy ban list our deck cant exceed 25 and basic lands dont count, im coming here for advice or ideas on decks thst would do good being a modern player without much knowledge of legacy cards i thank all of you gor the ideas and advice i just need help in the right direction thanks
More info on the tourny
No sideboard
Legacy banlist
And a total deck cost of 25 dollars or less excluding basics lands and using the cheapest printing of any card on tcg mid price
Entry is 5 deck list ate submitted before the event prize is a booster of iconic masters

I know you posted this long ago and the tourney is probably over but... I would probably play a burn deck with budget options.

Cheap $ Creatures -
4x Monastery Swiftspear - No less than 4 here
Spark Elemental - Sub-par creature, probably more efficient to use hellspark
Hellspark Elemental
Keldon Marauders
Hell's Thunder or Chandra's Phoenix as a 2 of or so possible.

Cheap $ Spells -
Flame Rift
4x Searing Blood - Don't play with less than 4
Fireblast
Skullcrack
Sulfuric Vortex
Incinerate
Rift Bolt

Moderate priced creatures you could eat your budget on -
Grim Lavamancer - I would probably play 1 or 2 of this guy if can fit budget

Moderate priced spells you could eat your budget on -
Chain Lightning or Lightning Bolt
Lava Spike

Sideboard -
Smash to Smithereens
Pyrostatic pillar
Pyroclasm
Tormod's Crypt - Also pumps swiftspear for free once as a nice side bonus

I'd love to help brew some decks. Are we too late? id the tournament already happen?