Collectible Card Game Headquarters

Describe the Bug:
1-When you activate Molten Vortex after you select land to discard,it get's discarded but then no prompt to target creature or player to damage.
2- When activated it taps.
Which card did behave improperly ?
Molten Vortex

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Manalink 2015/12/25: Battle For Zendikar,duel

What exactly should be the correct behavior/interaction ?
1- Molten Vortex
2- Tap is not required for activation cost
Are any other cards possibly affected by this bug ?
-

The result of poorly-designed interfaces: generic_activated_ability() and generic_spell() can be customized in substantially identical ways, using flags that are named substantially identically; but their flags have different values, and neither is capable of detecting when it's given the other function's flags. So for example in this case, the instruction to require and select a target turned into an activation cost of .

The same problem affects (with varying effects and severities) Arenson's Aura, Flicker, Forerunner of Slaughter, Gateway Shade, Goblin Chirurgeon, Haazda Shield Mate, Hecatomb, Nihilistic Glee, Pia and Kiran Nalaar, Quillspike, Seismic Assault, Spike Rogue, Trade Caravan, and Vedalken Mastermind. All fixed in 13e1d37.

There's bugs open for Vedalken Mastermind and Flicker; the former should be fixed by this (the bug changed a prompt-changing flag into a -1/-1 counter requirement), and I'll confirm it shortly, but the latter seems unrelated. It's certainly possible that some of the others actually were working already due to having both the wrong flag and wrong kind of flag and got the correct values by accident; they'll be broken now.