"Classic Sixth Edition", +~X (11)
Blaze deals X damage to any target.
Earthquake deals X damage to each creature without flying and each player.
Target creature gets +X/+0 until end of turn.
Hurricane deals X damage to each creature with flying and each player.
Look at target player's hand and choose X cards from it. That player discards those cards.
Counter target spell unless its controller pays . If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.
Each player draws X cards.
Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.
Counter target spell with mana value X. (For example, if that spell's mana cost is , X is 5.)
Target player gains X life.
Volcanic Geyser deals X damage to any target.
Gatherer works better in the Companion app!