Rock Hydra [Alpha Edition] Future Trunks Saga put a flow counter on

put a flow counter on Channel Lake Frigid then destroy it unless you put an Ice card from your pitch zone on the bottom of your deck for each flow counter on it

You can discard this card to the GY

Set: Skyridge Type: Lightning Rarity: Rare Retreat cost: Colorless

Set: Sun & Moon: Guardians Rising Type: Fighting Rarity: Secret Rare Retreat cost: Colorless

your opponent cannot select a face-down Defense Position monster as an attack target

Rock Hydra [Alpha Edition] Future Trunks Saga put a flow counter onSet: Alpha Edition Type: Creature Hydra Rarity: Rare Cost: {X}{R}{R} Rock Hydra enters the battlefield with X +1 +1 counters on it. For each 1 damage that would be dealt to Rock Hydra, if it has a +1 +1 counter on it, remove a +1 +1 counter from it and prevent that 1 damage. {R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn. {R}{R}{R}: Put a +1 +1 counter on Rock Hydra. Activate only during your upkeep.