Kargan Intimidator

Cowards can't block Warriors.
{1}: Choose one that hasn't been chosen this turn —
• This creature gets +1/+1 until end of turn.
• Target creature becomes a Coward until end of turn.
• Target Warrior gains trample until end of turn.

Foundations Jumpstart

Cowards can't block Warriors.
{1}: Choose one that hasn't been chosen this turn —
• Kargan Intimidator gets +1/+1 until end of turn.
• Target creature becomes a Coward until end of turn.
• Target Warrior gains trample until end of turn.

Magic Online Promos

Zendikar Rising Promos

Zendikar Rising

If you control two or more Kargan Intimidators, track which modes have been chosen each turn for each one's ability separately.

Once a creature has blocked a Warrior, turning that creature into a Coward won't remove it from combat or cause the Warrior to become unblocked.