mtg serialized ring cards The One - Foil - The 5 Serialized Cards That

The Blue one that costs a rougher four mana has size equal to your Island count, and then an ETB/attack trigger to toss a Flood counter on a land and it becomes an Island too

This card has narrow use

Theres also Bloodtithe Harvester which doubles as a removal spell, Caustic Bronco to help keep your hand full, and Sheoldred, the Apocalypse to further punish your opponent

Meanwhile, the downside is that Boros Aggro isn't nearly as heavily played as Azorius Aggro (having blue sideboard cards like Negate really helps shore up the matchup against Nexus of Fate / Wilderness Reclamation decks, along with Esper Control), and you'll still need to invest in Sacred Foundry and Clifftop Retreat, which aren't cheap