[fixed/closed]Bloodchief Ascension counters are obligatory.

[Aswan jaguar]

Describe the Bug:
Bloodchief Ascension 's ability to put counters is obligatory.

Which card did behave improperly ?
Bloodchief Ascension

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 ?
Bloodchief Ascension 's ability to put counters is optional.

Are any other cards possibly affected by this bug ?
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[Korath]

Fixed b34364f.