Crown of the League

The first Sorcery spell you cast each turn has
Cascade.
{c}{c}{u/r}: Reviviform valid target Host:
- When Host Controller casts their first
sorcery spell each turn, reveal the top card of
their library. You may deal X damage to any
target, where X equals the revealed card's
converted mana cost. Then, host controller
puts the revealed card into their hand.