mtg borderless cards list put up to three lore counters on it The 10 Borderless Artist Cards

If the two biggest threats at the table are attacking each other to keep their greatest rival in check, you can probably hold off (this is also a great stage where politicking can help)

This 4-drop is a 4/3, which is on curve for Blue and you can reduce its cost if you've cast instants and sorceries this turn

The first is Toxic , a more fair version of Infect that doesnt give poison counters for each damage dealt

If you already have the Science

Super-super-tech here would be to use Cauldron of Souls to give all the small creatures persist, perhaps even killing them automatically when they come back onto the battlefield