Hidden Memories, an artifact spell with a cost of 2 fire mana and one ice mana, might be overly costly for something that could produce any type of mana. However, it could be said that it was something that might able to help Ahli go for another turn.
HIDDEN MEMORIES
Fire Mana+Fire Mana+Ice Mana
[Artifact]
Produce one mana of any type.
Mana: -
Among Chaos Ascendancy and The Dead Never Sleeps, both spell needed three mana of one type and this artifact would open the path for it.
CHAOS ASCENDANCY
2+Fire Mana+Fire Mana+Fire Mana
[Magic Spell]
Deal 5 damage to any target.
Reveal your deck until you reveal a spell with total mana 4 or less. Cast it without paying its cost.
Mana: Fire
THE DEAD NEVER SLEEPS
X+Earth Mana+Earth Mana+Earth Mana
[Magic Spell]
Remove from the game X target unit from any used pile.
Create that many 2/2 ghouls under your control.