mtg from the vault relics card list Magic Gathering- the Vault: Opening: Sponsored by ABUGames.com Magic From the Vault Relics

When you cast a spell with X in the mana cost, you create a 0/0 green Hydra creature token, then put X +1/+1 counters on it

So I cast risk factor

Youre already committed to playing other peoples decks at that point

It's also hate that doesn't necessarily conflict with some other artifact strategies the way Stony Silence and others might - if a player has more expensive artifacts in their deck, for instance, Meltdown is still a great sideboard card that likely won't destroy their own game pieces but will still affect a cheaper-costed deck

But they are set up to grant you more and more value from singing songs - Pepa Madrigal, Sensitive Sister grants you free lore every time you sing a song, and Bruno Madrigal, Singing Seer will draw more cards than you know what to do with each time you sing

Note that this is a symmetrical effect for all players, so be cautious