Assist (Another player can pay up to of this spell's cost. You choose the value of X.)
Support X. (Put a +1/+1 counter on each of up to X target creatures.)
Each creature with a +1/+1 counter on it gains trample until end of turn.
You may reveal a card with assist and discuss how to pay for it before you begin to cast the spell. Targets are chosen for that spell before you choose another player to help you pay for it and before that player has committed any mana to doing so.
You canâ€™t put more than one +1/+1 counter on any one target using the support action.
You can cast The Crowd Goes Wild with 0 as the value of X. The spell wonâ€™t target any creatures, and creatures with +1/+1 counters on them will gain trample.
The final ability of The Crowd Goes Wild affects only creatures with a +1/+1 counter on them at the time itâ€™s applied. Creatures that get a +1/+1 counter later in the turn wonâ€™t gain trample, and creatures that lose their +1/+1 counters later in the turn wonâ€™t lose trample.
Support can target a creature another player controls.
Only the generic mana portion of a spellâ€™s cost can be paid with assist. Any colored mana costs must be paid by the spellâ€™s controller, even if the assisting player paid mana of that color.
If The Crowd Goes Wild has any targets and each of those targets is illegal as it tries to resolve, the spell doesnâ€™t resolve. No creatures gain trample. The crowd falls silent.
If some, but not all, targets for a spell become illegal, the remaining targets are affected as appropriate. If all of a spellâ€™s targets become illegal, that spell doesnâ€™t resolve.
If an effect allows a player to cast a spell spending mana â€œas though it were mana of any colorâ€ or â€œof any type,â€ that player must still pay for the colored mana in that spellâ€™s total cost. That cost doesnâ€™t become generic.
If a spell with support has other abilities that target creatures, those abilities and the support ability can target the same creature.
Assist allows another player to pay for any amount of generic mana. If an effect changes the cost of the spell, the amount that player may pay will be more or less than the amount in the spellâ€™s reminder text.